青海师范大学学报（自然科学版）
青海師範大學學報（自然科學版）
청해사범대학학보（자연과학판）
Journal of Qinghai Normal University(Natural Science Edition)
2015年
3期
56-59
,共4页
密码学%数字签名%前向安全%后向安全
密碼學%數字籤名%前嚮安全%後嚮安全
밀마학%수자첨명%전향안전%후향안전
cryptography%digital signature%forward-secure%backward-secure
双向安全签名是数字签名风险控制的重要表现形式,它可以确保在密钥泄露后数字签名的前向安全性和后向安全性.将哈希链技术、双私钥技术和零知识证明技术等融入到传统数字签名中,人们提出了一些双向安全签名方案,但迄今还没有提出双向安全签名的安全模型.本文给出双向安全签名的形式化定义和安全模型,为设计可证明安全的双向安全签名方案提供了重要保证.
雙嚮安全籤名是數字籤名風險控製的重要錶現形式,它可以確保在密鑰洩露後數字籤名的前嚮安全性和後嚮安全性.將哈希鏈技術、雙私鑰技術和零知識證明技術等融入到傳統數字籤名中,人們提齣瞭一些雙嚮安全籤名方案,但迄今還沒有提齣雙嚮安全籤名的安全模型.本文給齣雙嚮安全籤名的形式化定義和安全模型,為設計可證明安全的雙嚮安全籤名方案提供瞭重要保證.
쌍향안전첨명시수자첨명풍험공제적중요표현형식,타가이학보재밀약설로후수자첨명적전향안전성화후향안전성.장합희련기술、쌍사약기술화령지식증명기술등융입도전통수자첨명중,인문제출료일사쌍향안전첨명방안,단흘금환몰유제출쌍향안전첨명적안전모형.본문급출쌍향안전첨명적형식화정의화안전모형,위설계가증명안전적쌍향안전첨명방안제공료중요보증.
Forward-backward signature is the most important measure of the digital signature risk control,the signature mechanism make attackers can not forge the signer's previous and subsequent peri-ods of valid signature even if they get the signer's keys of the current period.Combining one-way Hash chain and the two keys and zero knowledge proof with existed digital signature,some forward-backward secure signatures have been proposed,but formalized security model of forward -backward secure signa-ture have not been presented.In order to solve this problem,the formal definition and security model of forward-backward secure signature were presented in this paper and it is benefit to design a forward -backward secure signature with provable security.
