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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 ...
SPORE, the Security Protocols Open Repository, is an online library of security protocols with comments and links to papers. Each protocol is downloadable in a variety of formats, including rules for use with automatic protocol verification tools. All protocols are described using BAN logic or the style used by Clark and Jacob, and their goals ...
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.
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.
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 ...
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 ...
The cryptographic two-party computation protocol is secure, if it behaves no worse than this ideal protocol, but without the additional trust assumptions. This is usually modeled using a simulator. The task of the simulator is to act as a wrapper around the idealised protocol to make it appear like the cryptographic protocol.
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 ...