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Protocolo de Diffie-Hellman 1. É usada para intercambio de chaves entre usuários; 2. É baseado na operação de logaritmos discretos; 3. Logaritmo discreto é baseado na raiz primitiva; 4. Requer autoridade de certificação (chave pública confiável). Passos 1.
Diffie–Hellman key exchange is a mathematical method of securely exchanging cryptographic keys over a public channel and was one of the first public-key protocols as conceived by Ralph Merkle and named after Whitfield Diffie and Martin Hellman.
29 de fev. de 2016 · L’algorithme Diffie-Hellman est un algorithme d’échange de clés, utilisé notamment lors de l’ouverture d’une connexion à un site sécurisé via le protocole SSL/TLS. Handshake. L’établissement...
- Antoine Ansel
A troca de chaves Diffie-Hellmann é um método seguro para a troca de chaves criptográficas que permite a duas partes que não têm conhecimento uma da outra o estabelecimento de uma chave secreta partilhada.
The Diffie-Hellman protocol is a scheme for exchanging information over a public channel. If two people (usually referred to in the cryptographic literature as Alice and Bob) wish to communicate securely, they need a way to exchange some information that will be known only to them.
Diffie-Hellman Key Exchange Protocol. Though by no means the only useful key exchange protocol, the Diffie-Hellman (D-H) protocol is used in quite a few systems. D-H permits both parties to an exchange (Bob and Alice) to supply part of the secret key. It is done in such a way that the entire key is not sent across the unsecured channel.
The 1976 seminal paper of Diffie and Hellman is a landmark in the history of cryptography. They introduced the fundamental concepts of a trapdoor one-way function, a public-key cryptosystem, and a digital signature scheme. Moreover, they presented a protocol, the so-called Diffie–Hellman protocol, allowing two parties who share no secret ...