Cryptology ePrint Archive: Report 2001/100

A Note on Girault's Self-Certified Model

Shahrokh Saeednia

Abstract: In this paper, we describe an important shortcoming of the first self-certified model proposed by Girault, that may be exploited by the authority to compute users' secret keys. We also show, while it is possible to make the attack ineffective by taking additional precautions, the resulting model loses all merits of the original model and does no longer meet the primary contribution of the self-certified notion.

Category / Keywords: Self-certified, Levels of trust, Random safe primes, Zero-knowledge, Discrete logarithm

Date: received 20 Nov 2001, last revised 3 Sep 2002

Contact author: saeednia at ulb ac be

Available format(s): Postscript (PS) | Compressed Postscript (PS.GZ) | BibTeX Citation

Version: 20020903:101441 (All versions of this report)

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