Details

Autor(en) / Beteiligte

• Wang, Tian-Yin
• Wang, Xiao-Xuan
• Cai, Xiao-Qiu
• Zhang, Rui-Ling

Titel

Analysis of efficient quantum multi-proxy signature

Ist Teil von

• Quantum information processing, 2020-08, Vol.19 (8), Article 241

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• An efficient quantum multi-proxy signature scheme was proposed recently, in which the original signatory Alice distributed her authority to several proxy signatories, and then each proxy signatory can sign the message for her alone. In this work, we give a cryptanalysis on this scheme and then point out an unnoticed problem that the proxy signatory must send the signed message to the verifier when he signs it, which is in conflict with the requirement of digital signatures. Furthermore, this problem will give a good chance for an unreliable proxy signatory to deny his signature on the message. Finally, an improved version is presented, which is more economical and practical with current technology compared with the original scheme.