3 Yao, Frances Yin, Yiqun Lisa 2005 IEEE Transactions on Information Theory, vol. 51, no. 9, pp.3292-3297, Sept. 2005, and Proceedings of the Cryptographers' Track at the RSA Conference (CT-RSA 2005), Lecture Notes in Computer Science San Francisco, California, USA 3376 245-261 Feb. 2005 cryptography, iterative methods http://palms.ee.princeton.edu/PALMSopen/yao05design.pdf