raiarea-1----Page:7
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
|
Bid-Down Attack Alice Biloxi Bob INVITE (AES-128, AES-256) INVITE (AES-128) (Bob selects AES-128) Attacker removes AES-256 ANSWER (AES-128) SRTP (AES-128) Bid down SRTP encryption level Bid down to RTP (mult/alt, SDP grouping) ANSWER (AES-128) |