一种安全可追责的基于身份密码方案

One kind of Provable Secure Accountable Identity-Based Encryption

可追责的基于身份密码体制可以缓解基于身份密码体制的密钥托管问题:仲裁者根据获取的非法私钥判断其是否由私钥生成器恶意生成。本文针对一种可行的可追责的基于身份密码方案,将其中的零知识证明改为用双线性对运算实现;以此为基础,结合一次性签名方案提出一种具有IND-sID-CCA安全性的可追责的基于身份密码方案,并给出相关证明。

Accountable identity-based cryptography can ease the inherent key escrow problem of identity-based cryptography： an arbiter could make the judgment of whether PKG has done the malicious behavior to generate the private key or not according to the obtained illegal private key. In this paper, the authors focus on a practical accountable identity-based cryptographic scheme and achieve the scheme by using bilinear pairing instead of ze- ro-knowledge proof; furthermore, the authors propose an IND - sID - CCA security accountable identity-based cryptographic scheme combined with a one-time signature scheme, and give the relevant proof at last.