Method, system, device for proving the authenticity of an...

Details Method, system, device for proving the authenticity of an... Method, system, device for proving the authenticity of an...

H - Electricity

04

L

H04L 9/32 (2006.01) H04L 9/28 (2006.01)

Patent

CA 2360887

The proof is provided by means of the following parameters: a public module n formed by the product of f prime factors pi, f>2; a public superscript v; m base numbers gi, m>1. The base numbers gi are such that the two equations: x<2> gi mod n and x<2> -gi mod n cannot de solved in x in the ring of integers modulo n, and such that the equation x<v> gi<2> mod n can be solved in x in the ring of integers modulo n in the case where the public superscript v is in the form v = 2<k>, wherein k is a security parameter.

La preuve est établie au moyen des paramètres suivants: un module public n constitué par le produit de f facteurs premiers, p i,f > 2, un exposant public v, m nombres de base, g i, m > 1. Les nombres de base g i, sont tels que les deux équations: x2 = g i mod n et x2 = g i mod n n'ont pas de solution en x dans l'anneau des entiers modulo n, et tel que l'équation x v .ident. -g i2 mod n a des solutions en x dans l'anneau des entiers modulo n dans le cas, où l'exposant public v est de la forme v = 2k où k est un paramètre de sécurité.

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