Sequence number: (16 bits) The sequence number is incremented for each RTP data packet sent and is to be used by the receiver to detect packet loss[1] and to accommodate out-of-order delivery. The initial value of the sequence number should be randomized to make known-plaintext attacks on Secure Real-time Transport Protocol more difficult.[13]:13
The known-plaintext attack (KPA) is an attack model for cryptanalysis where the attacker has access to both the plaintext, and its encrypted version (ciphertext). These can be used to reveal further secret information such as secret keys and code books. The term "crib" originated at Bletchley Park, the British World War II decryption operation.
References:
https://en.wikipedia.org/wiki/Real-time_Transport_Protocol
The known-plaintext attack (KPA) is an attack model for cryptanalysis where the attacker has access to both the plaintext, and its encrypted version (ciphertext). These can be used to reveal further secret information such as secret keys and code books. The term "crib" originated at Bletchley Park, the British World War II decryption operation.
References:
https://en.wikipedia.org/wiki/Real-time_Transport_Protocol
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