Public key distribution protocol Diffie-Hellman

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Public key distribution protocol Diffie-Hellman - cryptographic key exchange protocol proposed in 1976, based on asymmetric cryptoschemes. This protocol provides a shared secret, which becomes available to two or more parties for later use. The resulting shared secret (key) can be transmitted over insecure channels by listening.

Description of the protocol for the two parties

This protocol is very simple, in table 1 below its description.

There are two party protocol: A and B, and there is a trusted party. On the trusted side produced some data available to both parties.