Quantum oblivious transfer protocol based on entangled states

We describe an efficient protocol for quantum oblivious transfer. The protocol, which can be implemented with present technology, is secure against cheaters with unlimited computing power and with the ability to store the particles for an arbitrarily long period of time. The protocol is based on the following two entangled states: | Φ〉 = 1 √ 2 (|↑↑〉+ |↓ x〉) and |Ψ〉 = 1 √ 2 (|↑↑〉+ |↓ −x〉). PACS number(s): 03.65.Bz, 89.70.+c, 89.80.+h email address:[email protected]