Analysis of Baby-Step Giant-Step Algorithms for Non-uniform Distributions (with K.Nagao, S.Uchiyama and K.Matsuo). IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences. 2004. Vol.E87-A No.1, pp.10--17
Elkies' Point Counting Algorithm of Genus Two Hyperelliptic Curves and Its Implementation (with K.Nagao and S.Uchiyama). IEICE Transactions on Fundamentals of Electronics,Communications and Computer Sciences. 2003. Vol.E86-A No.4, pp.919--927
Remarks on elliptic curve discrete logarithm problems (with T.Kobayashi, T.saito and S.Uchiyama). IEICE Transactions on Fundamentals of Electronics,Communications and Computer Sciences. 2000. Vol.E83-A,No.1, pp.17--23