Most of today's widely used communications use VoIP services and hence it can be predicted that IP telephones will be pioneered and heavily used in the future. In the same way, the growing expansion of the use of VoIP will cause extensive security problems.
Until a few years ago, VoIP security was not paid much attention due to other attractive features that this system had, and there was less discussion about its weaknesses. The issue of security was not an important issue until a few years ago, and most VoIPs worked on local and wide area networks and were more or less secure and protected from attacks against users on the public Internet. But as the use of VoIP expanded and became widespread and the phone became available on the Internet, the issue of VoIP security for users gradually became an important issue like network security. This concern arose because the next generation of these networks will be based on IP, and IP protocols for sending voice are not without problems and have many problems.
Who is most at risk?
The Internet environment for using VoIP can be dangerous for several reasons. The most important of these reasons is that attacks in this environment are largely untraceable and the entire network is constantly at risk. Adequate protection in the Internet environment has never been developed in such a way that it can be considered completely safe, and the dangers on the Internet make these threats potentially possible.
How and in what form is this vulnerability? Most VoIP traffic on the Internet is unencrypted. For this reason, anyone who has access to the network can easily listen to the conversations. Eavesdropping is one of the most common threats in this field. Now suppose someone hears your voice when you say the second password of your card? A suitable solution is that to prevent this, all packets should be checked to create a suitable path to the destination, it seems that this will solve the problem completely?
But this is only a small part of the problem. Hackers can hack SIP messages and IP addresses and listen to the entire conversation. Hackers can impersonate the user and spoof the real user's identity, meaning that the recipient cannot correctly identify the true identity of the sender.
SRTP protocol
The transmission security protocol, which is called SRTP for short, is the new version of the RTP security protocol, which has much wider and better security features than before. This protocol, like the RTP protocol, is used to establish communication security in VoIP. One of the important advantages of this security protocol is that it can be improved and expanded.
The SRTP protocol has been developed by the experts of Cisco and Ericsson, and it was released in March 2004 by the IETF with RFC3711 standard. The SRTP protocol uses coding and encryption to reduce the risk of cyber attacks. The SRTP protocol has achieved good results in various communication environments, both cable and wireless, and today it is known as the strongest security protocol in the field of VoIP.
