How to Forge a Time-Stamp Which Adobe's Acrobat Accepts.

Tetsuya Izu Takeshi Shimoyama Masahiko Takenaka How to Forge a Time-Stamp Which Adobe's Acrobat Accepts. 54-72 2007 conf/ima/2007 IMA Int. Conf. http://dx.doi.org/10.1007/978-3-540-77272-9_4 db/conf/ima/ima2007.html#IzuST07