Huafei Zhu Constructing Committed Signatures from Strong-RSA Assumption in the Standard Complexity Model. 101-114 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2947&spage=101 2004 conf/pkc/2004 Public Key Cryptography db/conf/pkc/pkc2004.html#Zhu04