We assume that there is no efficient way to extract (separate) the secret color from the mixed color, so third parties who know the mixed colors cannot reveal the secret colors.

Alice and Bob publicly exchange their two mixed colors.

The next steps in the color exchanging scenario are as follows: The obtained mixed colors area ready for public exchange (in our case orange and light sky blue).

Finally Alice and Bob mix their secret color together with their mutually shared color.

Alice and Bob separately select a secret color that they keep to themselves (e.g.

Alice and Bob, agree on an arbitrary starting (shared) color that does not need to be kept secret (e.g.

This is the color exchange scenario, step by step: The design of color mixing key exchange scheme assumes that if we have two liquids of different colors, we can easily mix the colors and obtain a new color, but the reverse operation is almost impossible: no way to separate the mixed colors back to their original color components.

This is why we shall first explain how to exchange a secret color by color mixing. The Diffie–Hellman Key Exchange protocol is very similar to the concept of ' key exchanging by mixing colors', which has a good visual representation, which simplifies its understanding. The Diffie–Hellman Key Exchange protocol can be implemented using discrete logarithms (the classical DHKE algorithm) or using elliptic-curve cryptography (the ECDH algorithm). Note that the DHKE method is resistant to sniffing attacks (data interception), but it is vulnerable to man-in-the-middle attacks (attacker secretly relays and possibly alters the communication between two parties).

The Diffie–Hellman (DH) method is anonymous key agreement scheme: it allows two parties that have no prior knowledge of each other to jointly establish a shared secret key over an insecure channel. using a symmetric cipher like AES).ĭHKE was one of the first public-key protocols, which allows two parties to exchange data securely, so that is someone sniffs the communication between the parties, the information exchanged can be revealed. The exchanged keys are used later for encrypted communication (e.g. Diffie–Hellman Key Exchange (DHKE) is a cryptographic method to securely exchange cryptographic keys (key agreement protocol) over a public (insecure) channel in a way that overheard communication does not reveal the keys.

Diffie hellman calculator