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Provable security of digital signatures in the tamper-proof device model

  • N. P. Varnovskii
Published/Copyright: September 30, 2008
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Discrete Mathematics and Applications
From the journal Volume 18 Issue 4

Abstract

Proofs of security for practical signature schemes are known in idealised models only. In the present paper, we consider the tamper-proof device model that does not use ideal primitives. Instead of access to a random oracle each participant is provided with tamper-proof device implementing a private-key cryptosystem. The hash-value of a message to be signed is submitted to the tamper-proof device for encryption and this encrypted value is used in the signature generation algorithm. In this model, we prove, modulo a physical assumption, a necessary and sufficient condition for security of the GOST signature scheme.

Received: 2008-08-25
Published Online: 2008-09-30
Published in Print: 2008-October

© de Gruyter 2008

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