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For Your Reference: ZRTP - The Technology behind Silent Phone
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Will Silent Phone’s protocol pass FIPS-140 validation?
Why is the ZRTP protocol better?
Why is it called ZRTP?
Why do we need ZRTP if we already have SRTP? Isn’t SRTP good enough?
What about DTLS-SRTP? Why not use that?
Why do we need secure VoIP?
Does Silent Phone use Variable Bit Rate (VBR) codecs? Don’t they leak information?
Why can’t I just use IPsec to encrypt my VoIP calls?
Does Silent Phone protect against “social network analysis” and other forms of analysis based on traffic patterns?
Will the government attempt to stop VoIP encryption?
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Authentication Keywords
Can ZRTP use a PKI (public key infrastructure)?
Does Silent Phone protect against “social network analysis” and other forms of analysis based on traffic patterns?
Does Silent Phone use Variable Bit Rate (VBR) codecs? Don’t they leak information?
Does ZRTP slow down the VoIP call?
Do Silent Phone and ZRTP encrypt Touch-Tone keypad DTMF tones?
Do you support Elliptic Curve Diffie-Hellman?
Exactly how does Silent Phone and ZRTP protect against a man-in-the-middle (MiTM) attack?
How does ZRTP verify the identity of who you call?
How do ZRTP’s key continuity features compare with SSH?
Isn’t it a protocol layer violation to do the key management in the media instead of in the signaling?
Is there an IETF RFC for the ZRTP protocol?
Is the Short Authentication String (SAS) vulnerable to an attacker with voice impersonation capabilities?
Is ZRTP CALEA compliant?
Is ZRTP covered by any patents?
Is ZRTP covered by any patents?
My VoIP phone already uses SDES to negotiate keys. Is that safe?
What about DTLS-SRTP? Why not use that?
Why can’t I just use IPsec to encrypt my VoIP calls?
Why do we need secure VoIP?
Why do we need ZRTP if we already have SRTP? Isn’t SRTP good enough?
Why is it called ZRTP?
Why is the ZRTP protocol better?
Will Silent Phone’s protocol pass FIPS-140 validation?
Will the government attempt to stop VoIP encryption?
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For Your Reference: ZRTP - The Technology behind Silent Phone
Silent Circle - How to's
Silent Phone and Silent World
Silent Phone Handbook
Silent Phone iOS Release Notes
Silent Phone SPa (Android) Release Notes