Protocol 2

Let’s learn about the flow and messages of our second candidate protocol.

Protocol assumption

The illustration below shows our second candidate protocol’s flow and messages.

As can be seen from the illustration below, Protocol 2 is very similar to Protocol 1. It’s in the protocol assumptions that the main differences lie:

  • Bob has access to a source of randomness: This is the same as for Protocol 1.

  • Alice has been issued a signature key, and Bob has access to a verification key that corresponds to Alice’s signature key: This is the digital signature scheme equivalent of the second assumption for Protocol 1.

  • Alice and Bob agree on using a strong digital signature scheme.

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