Tetsuya Izu Noboru Kunihiro Kazuo Ohta Makoto Sano Masahiko Takenaka Sanitizable and Deletable Signature. 130-144 2008 WISA http://dx.doi.org/10.1007/978-3-642-00306-6_10 conf/wisa/2008 db/conf/wisa/wisa2008.html#IzuKOST08