The invention concerns a method and systems for securing data in a context comprising several distinct groups of users using a hash function H common to multiple groups including a step of calculating a message digest applied to said data to be secured. The invention is characterized in that said step of calculating a message digest is performed using said common hash function H applied to the result of the application, to said data, based on an injective function g.
申请公布号
WO2007125263(A2)
申请公布日期
2007.11.08
申请号
WO2007FR51196
申请日期
2007.04.30
申请人
GROUPE DES ECOLES DES TELECOMMUNICATIONS-ENST;SERHROUCHNI, AHMED;ADIB, MUSTAPHA