A system for encrypting computer files associates a key file with the encrypted file. Operations performed on the encrypted file are also performed on the key file. The key file includes a list of users to whom the encrypted file is available together with the public key certificates for those users. The symmetric key is held in the key file wrapped with the authorised user certificates.
申请公布号
WO2004001561(A2)
申请公布日期
2003.12.31
申请号
WO2003GB02656
申请日期
2003.06.20
申请人
ARMOURSOFT LIMITED;CRITTEN, RICHARD;CHARLESWORTH, JAMES, EDWARD;LARTER, ANDREW;GREEN, PETER;DALE, TRACY, JOHN
发明人
CRITTEN, RICHARD;CHARLESWORTH, JAMES, EDWARD;LARTER, ANDREW;GREEN, PETER;DALE, TRACY, JOHN