TLS stands for “Transport Layer Security” and it is the security protocol used to encrypt “data” related to VoIP phone calls.
TLS is the last and better version of the most known Secure Sockets Layer (SSL), which is the previous cryptographic protocol designed to provide communications security over the Internet. SSL is employed on every bank website and other websites that manage confidential information.
TLS is a standard protocol approved by IETF (Internet Engineering Task Force) and then updated in RFC 5246.
TLS enables communications over an open network, such as the Internet, without the fear of being wiretapped. This has been universally acknowledged by the whole international community.