Cryptology ePrint Archive: Report 2010/317

A Note On Gottesman-Chuang Quantum Signature Scheme

Zhengjun Cao

Abstract: In 2001, Gottesman and Chuang proposed a quantum signature scheme. Unlike classical signature schemes, the public keys in the scheme can only be used once. The authors claim that the scheme is somewhat cumbersome but it serves as a good model and suggests novel research directions for the field of quantum cryptography. In this note, we remark that the Gottesman-Chuang quantum signature scheme is so commonplace and cumbersome that it can not suggest the potential for quantum public key cryptography. The authors ignore an ultimate fact, namely, the cost to grantee the authenticity of a user's public key is expensive in the scenario of Public Key Infrastructure. It entails that a user's public key should be repeatedly usable in the life duration.

Category / Keywords: cryptographic protocols /

Date: received 27 May 2010, last revised 31 May 2010

Contact author: caozhj at yahoo cn

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Version: 20100601:011538 (All versions of this report)

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