@misc{cryptoeprint:2004:366, author = {Shigeo Tsujii and Kohtaro Tadaki and Ryou Fujita}, title = {Piece In Hand Concept for Enhancing the Security of Multivariate Type Public Key Cryptosystems: Public Key Without Containing All the Information of Secret Key}, howpublished = {Cryptology ePrint Archive, Report 2004/366}, year = {2004}, url = {http://eprint.iacr.org/2004/366}, }