期刊
QUANTUM INFORMATION PROCESSING
卷 12, 期 8, 页码 2655-2669出版社
SPRINGER
DOI: 10.1007/s11128-013-0554-4
关键词
Arbitrated quantum signature; Forgery; Improvement
资金
- NSFC [61170270, 61100203, 61272057, 61202434, 61003286, 61121061]
- NCET [NCET- 10- 0260]
- Beijing Natural Science Foundation [4112040, 4122054]
- Fundamental Research Funds for the Central Universities [2011YB01, 2012RC0612]
As a feasible model for signing quantum messages, some cryptanalysis and improvement of arbitrated quantum signature (AQS) have received a great deal of attentions in recent years. However, in this paper we find the previous improvement is not suitable implemented in some typical AQS protocols in the sense that the receiver, Bob, can forge a valid signature under known message attack. We describe the forgery strategy and present some corresponding improved strategies to stand against the forgery attack by modifying the encryption algorithm, an important part of AQS. These works preserve the merits of AQS and lead some potential improvements of the security in quantum signature or other cryptography problems.
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