有界恢复模型下弹性泄露签名的新构造

New Constrcution of Leakage-resilient Signature in Bounded Retriveal Model

弹性泄露密码学是当前密码学研究的热点.给出一个弹性泄露签名的定义,该定义是标准签名定义的一个扩展.构造一个有界恢复模型下的弹性泄露签名方案,并在标准模型下证明了它的安全性.本文的方案基于双线性配对的弹性泄露签名,结合了一次签名和Waters签名的特,通过改进,长度可大大缩短,克服了一次签名签名长度过长的缺点,具有较好的实用价值.

Leakage-resilient cryptography is very hot in the research of cryptography. We gvie a formal definition of leakage-resilient signature, which is a extension to the standard definition of signature. We construction a new leakage-resilient signature scheme in bounded retrvieal model, and prove its security based on the standard model. Our scheme is the first leakage-resilient signature from bilinear pairings, which is combined with the characteristics of one-time signature and Waters signature. The scheme also can be im- proved in signature size, which overcomes the shortcoming of large signature size in one-time signature. Hence, it demonstrates a better applicability.