@misc{cryptoeprint:2006:051, author = {Shigeo Tsujii and Kohtaro Tadaki and Ryou Fujita}, title = {Proposal for Piece In Hand Matrix Ver.2: General Concept for Enhancing Security of Multivariate Public Key Cryptosystems}, howpublished = {Cryptology ePrint Archive, Report 2006/051}, year = {2006}, url = {http://eprint.iacr.org/2006/051}, }