基于PUFS的不经意传输协议

Oblivious transfer based on physical unclonable function system

不经意传输(OT,oblivious transfer)协议是密码学中的一个基本协议。基于物理不可克隆函数(PUF,physical unclonable function)给出物理不可克隆函数系统(PUFS,physical unclonable function system)的概念,并在此基础上提出一个新的不经意传输协议(POT,PUFS based OT),最后在通用可组合(UC,universal composition)框架内给出POT协议抵抗静态敌手的安全性证明。相比于传统基于公钥加密的OT方案,POT协议不使用任何可计算的假设,而是基于PUFS的安全属性实现,因此在很大程度上减小了计算和通信开销。

Oblivious transfer(OT) is a fundamental protocol in cryptography. According to the analysis of physical unclonable function, a physical unclonable function system framework was defined, and a novel oblivious transfer(POT, PUFS based OT) protocol was proposed based on this framework. Finally, a security analysis of this POT protocol in the universal composition framework was given in detail. Compared with the traditional public key encryption OT scheme, POT protocol does not use any computational assumptions but rather the secure property of PUFS, and thus this scheme needs less computation and communication cost.