Signalling & Voice Encryption in Asterisk

RequirementWe Need to protect voice and signalling traffic between Asterisk peers or between Asterisk server and client extension from eavesdropping.

Solution :
Encryption of Signalling in SIP protocol can be done by TLS ( Transport Layer Security ). since Asterisk Version 1.6 TLS support is available.


In order to prevent eavesdropping of the voice call data made by SIP enabled technology, cryptography plays a primary role of defense. SRTP (Secure Real-time Transport Protocol) protocol is the answer to the encryption of voice data and protection against threats to voice confidentiality and integrity.Since asterisk version 1.8, SRTP is supported natively.

Open Source Asterisk Hardware