What mechanism does Avaya Aura use for secure calls?

Avaya Aura utilizes Transport Layer Security (TLS) and Secure Real-time Transport Protocol (SRTP) as its mechanism for securing calls. TLS is a protocol that ensures privacy between communicating applications and users, while SRTP encrypts the audio and video streams in a call, enhancing the confidentiality and integrity of the media being transmitted.

This combination is particularly effective in protecting against eavesdropping and tampering, making it suitable for a VoIP environment where sensitive information may be exchanged. The use of TLS helps in securing the signaling path, while SRTP focuses on securing the media path, thus providing a comprehensive security approach for call handling and media transmission within the Avaya Aura system.

In contrast, while a Virtual Private Network (VPN) can provide a secure network connection, it is not specifically tailored for the protection of VoIP signaling and media. End-to-End Encryption (E2EE) is a broader concept that refers to encrypting data at the source and decrypting it at the intended destination, but it is not necessarily the standard approach used in Avaya Aura. Secure Socket Layer (SSL) is a predecessor to TLS and is generally not the preferred choice for securing VoIP communications today.