Hsi-Chung Lin Sung-Ming Yen Guan-Ting Chen Adaptive-CCA on OpenPGP Revisited. 452-464 http://dx.doi.org/10.1007/978-3-540-30191-2_35 2004 conf/icics/2004 ICICS db/conf/icics/icics2004.html#LinYC04