Diffie-Hellman
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Diffie-Hellman
(cryptography)This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
Also found in: Dictionary, Medical, Acronyms.
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Elliptic curve Diffie-Hellman is an is an obscure key conformity protocol that permits two clients, each having an elliptic bend public-private key combine off, to create a mutual undisclosed over an uncertain channel.
Bernstein, "Curve25519: New Diffie-Hellman Speed Records", in Public Key Cryptography (PKC 2006), Lecture Notes in Computer Science, vol.
An adversary who intercepts R, z, s, T, g, h, and C between the reader and the tag and attempts to obtain the tag ID cannot get the session key KTR, because this is computationally infeasible under the Diffie-Hellman problem and the elliptic curve discrete logarithm problem (ECDLP).
For commonly used 1024-bit keys, it would take about a year and cost a "few hundred million dollars" to crack just one of the extremely large prime numbers that form the starting point of a Diffie-Hellman negotiation.
Elliptic Curve Computational Diffie-Hellman Problem (ECCDHP): Given G and two point xG, yG, computation of xyG is hard, where x, y [member of] [Z.sub.p.sup.*] and are randomly chosen and are smaller than n.
Assuming the hardness of computational Diffie-Hellman problem over groups in bilinear maps, the proposed CLAS scheme is proven secure in random oracle model, Bellare and Rogaway (1993).
(2.) Rouse, M., "Diffie-Hellman key exchange (exponential key exchange)," TechTarget, August 2007.
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