基于身份认证加密的匿名私钥共享方案

摘要

为了解决基于身份的认证加密方案的私钥共享问题，结合可验证门限秘密共享方案和安全多方计算，文章提出了一种新的匿名私钥共享方案，将用户私钥的共享问题转化为整数的秘密共享问题，减少了很多的双线性计算，降低了基于身份的加密方案中秘密泄露的风险，避免了权力过度集中的问题。并通过分析可知，此方案可以防止单个可信中心的欺诈或攻击，同时也防止多个可信中心的共谋攻击。%In order to solve the private sharing problem in the authenticated identity-based scheme, combined with threshold verifiable secret sharing scheme and secure multi-party computation ,a new anonymous private key sharing scheme is proposed, user private key sharing problem can be converted to the secret sharing problem for integers ,a lot of bilinear pairing computations is reduced, the risk of compromising secret of the identity-based encryption scheme is reduced ,the problem of excessive concentration of power is avoided. And through the analysis shows that this scheme is to prevent fraud or a single trusted center attack , but also to prevent multiple trusted center collusion attack.