Encrypted voice over RTMFP


I'm the voice messanger encrypted coding. I heard, that its flow in NetStream is encrypted by the symmetric key algorithm. Is this true? If this is the case, where it is generated? Is the exchange of keys between peers based on smth like SSL (secure public key algorithm Protocol)? I want to make sure that no one can access this symmetric key. I would appreciate detailed information about encryption of transmission (graphics, technical references) because I am preparing studies on this subject. Thanks in advance for your help.


Here is the information that we / i have disclosed in the past. I'm not able at the moment to share more.

all packets are encrypted with AES-128-CBC.

AES encryption keys are derived using Diffie-Hellman with a main module of 1024-bit (RFC 2409 MODP Group 2) end-to-end.

all certificates of client Flash RTMFP include their public key DH used in the agreement of key-to-end.  the "peer ID" (NetConnection.nearID) is the SHA-256 of the certificate hash.  private/public Diffie-Hellman key is chosen at random for each new NetConnection using cryptographic Pseudo-aleatoire number source of the platform (for example/dev/urandom).

This construction makes customer Flash ID approved tamperproof.  only one NetConnection in a client Flash operation can normally never have an identifier given by the peers.  It is only possible to have a network successful connection between two peers of customer if these peers have the private keys associated with their public keys.  an attacker masquerading as other peer can copy the certificate but not the private key, so the network connection will cannot succeed (since the attacker can not calculate the shared secret Diffie-Hellman that goes with the connection between the peer two IDs and therefore cannot calculate session AES keys, waiting for the other end).

the nearNonce and the farNonce are also derived from the Diffie-Hellman shared secret and is known only for the two endpoints.  they are secret and impossible to forge.  they can be used as cryptographic challenges in the handshakes of application layer.

Tags: Adobe

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