Eonkyung Lee Right-Invariance: A Property for Probabilistic Analysis of Cryptography Based on Infinite Groups. 103-118 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3329&spage=103 2004 conf/asiacrypt/2004 ASIACRYPT db/conf/asiacrypt/asiacrypt2004.html#Lee04