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A cryptographic protocol is an abstract or concrete protocol that performs a security-related function and applies cryptographic methods, often as sequences of cryptographic primitives. A protocol describes how the algorithms should be used and includes details about data structures and representations, at which point it can be used to ...
The protocol is defined for a cyclic group of order with generator . In order to prove knowledge of x = log g y {\displaystyle x=\log _{g}y} , the prover interacts with the verifier as follows: In the first round the prover commits himself to randomness r {\displaystyle r} ; therefore the first message t = g r {\displaystyle t=g^{r}} is ...
Cryptographic protocols — the communication protocols designed and available to provide computer security assurances using cryptographic mechanisms. Classic assurances include internet protocols for confidentiality and message integrity — and more recent research includes anonymity assurances.
The sender of an encrypted (coded) message shares the decryption (decoding) technique only with the intended recipients to preclude access from adversaries. The cryptography literature often uses the names "Alice" (or "A") for the sender, "Bob" (or "B") for the intended recipient, and "Eve" (or "E") for the eavesdropping adversary. [6]
In cryptography, security (engineering) protocol notation, also known as protocol narrations [1] and Alice & Bob notation, is a way of expressing a protocol of correspondence between entities of a dynamic system, such as a computer network. In the context of a formal model, it allows reasoning about the properties of such a system.
One of the earliest applications of a non-commutative algebraic structure for cryptographic purposes was the use of braid groups to develop cryptographic protocols. Later several other non-commutative structures like Thompson groups , polycyclic groups , Grigorchuk groups , and matrix groups have been identified as potential candidates for ...
Example scenario where communication between Alice and Bob is intercepted by Mallory. Alice and Bob are fictional characters commonly used as placeholders in discussions about cryptographic systems and protocols, [1] and in other science and engineering literature where there are several participants in a thought experiment.
Protocol Composition Logic is a formal method that can be used for proving security properties of cryptographic protocols that use symmetric-key and public-key cryptography. PCL is designed around a process calculus with actions for various possible protocol steps (e.g. generating random numbers, performing encryption, decryption and digital ...