Casual Transfer Protocol Analysis And Design

Oblivious transfer scheme has become one of the cryptographic basis, it means todeliver the message between the participants in a vague way, and protect the privacyof the participation. Oblivious transfer schemes foremost have two participants:Information holder, Information receiver.The traditional schemes are on the form of1-to-1(one IH-to-one IR). This papergives the new form(1-to-t) of oblivious transfer schemes which are diferent from thetraditionary schemes. The existent oblivious transfer schemes are very singularly,and their complexity is high, also the efciency is low. The new form not onlyhas high efciency, also still guarantee the privacy of tradition oblivious transferschemes. So, the new schemes of the paper satisfy the requirements of electroniccommerce and electronic government.The main content of this paper are as follows:(1)Give one1-to-n OT_n~1scheme based on RSA, which is on the basis of Tzeng’sschemes, And, give the related analysis of the correctness, the security and thecomplexity.(2)Give one1-out-of-n oblivious transfer scheme in the light of Zhao ect’sscheme.,Then give one1-to-n OT_n~1scheme with hidden authentication. Also givesthe related analysis of the both schemes.Through the analysis, we find that the new schemes are not only satisfy thecharacteristics, also have merits on computing complexity, efciency and practica-bility.