Jinhui Chao Kazuo Tanada Shigeo Tsujii Design of Elliptic Curves with Controllable Lower Boundary of Extension Degree for Reduction Attacks. 50-55 http://dx.doi.org/10.1007/3-540-48658-5_6 1994 conf/crypto/1994 CRYPTO db/conf/crypto/crypto94.html#ChaoTT94