Unconditionally secure quantum oblivious transfer
Guang-Ping He, Z. D. Wang · arXiv (Cornell University) · 2003
Based on quantum uncertainty and quantum entanglement, an quantum allor-nothing oblivious transfer protocol is proposed. It is illustrated in detail that the protocol is unconditionally secure. The distinct merit of the present protocol lies in that it is not based on quantum bit commitment. The full utilization of the entanglement makes the protocol different from previous insecure ones, thus its security is not restricted by the no-go theorem of twoparty secure computations. Typeset using REVTEX 1 The research on the oblivious transfer (OT) problem may be traced back to more than twenty years ago [1,2]. Kilian [3] pointed out later that OT is very important in two-party and multi-party protocols. This is because in most symmetrical protocols, the participants always know each others ’ data. If some participants are dishonest or try to get extra information, the protocols become insecure. OT can create some secret between the participants and break this symmetry. Thus it can be used to implement multi-party protocols such as