基于不可区分混淆的定时释放密码方案

New timed-release encryption based on indistinguishability obfuscation

定时释放加密是一种将消息发送到未来的加密体制,构造出一个安全可行的定时释放加密方案可解决很多实际问题。针对不可区分混淆和定时释放密码方案进行了研究,提出一种方案,该方案将发送者的加密以及接收者的解密过程封装成电路,并利用不可区分混淆器混淆此电路,可以有效地利用混淆器混淆电路的时间,简化了方案,并且极大地提高了方案的安全性;最后证明了方案的正确性及安全性。

Timed-release encryption（TRE） is a cryptography that studies the problem of sending information into the future, it can solve many practical problems to construct a feasible and safe TRE. This paper proposed a scheme based on the research of indistinguishability obfuscation and TRE. This scheme encapsulated the sender＇ s encryption and receiver＇ s decryption by a circuit and obfuscated this circuit by an indistinguishability obfuscator. It could make great use of the time of obfuscators obfuscate circuits, simplified the scheme and improved the security of this scheme. Finally, this paper proves the correctness and security of this TRE scheme.