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Security Problem on Arbitrated Quantum Signature Schemes
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- Authors
- Jeong Woon Choi, Ku-Young Chang, Dowon Hong
- Issue Date
- 2011-12
- Citation
- Physical Review A : Atomic, Molecular, and Optical Physics, v.84, no.6, pp.1-5
- ISSN
- 1050-2947
- Publisher
- American Physical Society(APS)
- Language
- English
- Type
- Journal Article
- Abstract
- Many arbitrated quantum signature schemes implemented with the help of a trusted third party have been developed up to now. In order to guarantee unconditional security, most of them take advantage of the optimal quantum one-time encryption based on Pauli operators. However, in this paper we point out that the previous schemes provide security only against a total break attack and show in fact that there exists an existential forgery attack that can validly modify the transmitted pair of message and signature. In addition, we also provide a simple method to recover security against the proposed attack. © 2011 American Physical Society.
- KSP Keywords
- Arbitrated quantum signature, Signature scheme, Trusted Third Party, Unconditional security, existential forgery, forgery attack, simple method