ZRTP: Media Path Key Agreement for Unicast Secure RTP

作者: Philip Zimmermann , Alan Johnston , Jon Callas

DOI:

关键词: Public key infrastructureComputer securitySignaling protocolZRTPComputer scienceSession keyVoice over IPMan-in-the-middle attackSession Description ProtocolSession (computer science)Computer network

摘要: This document defines ZRTP, a protocol for media path Diffie-Hellman exchange to agree on session key and parameters establishing unicast Secure Real-time Transport Protocol (SRTP) sessions VoIP applications. The ZRTP is keying because it is multiplexed the same port as RTP does not require support in the signaling protocol. assume Public Key Infrastructure (PKI) or complexity of certificates in end devices. For session, provides confidentiality, protection against man-in-the-middle (MiTM) attacks, and, cases where end-to-end integrity protection, authentication. can utilize Session Description (SDP) attribute provide discovery authentication through the signaling channel. To best effort SRTP, utilizes normal RTP/AVP profiles. secures which include voice media stream, also secure do include voice by using an optional digital signature.

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