| 摘要 |
A password formed of several fields ( 101 - 105 ) is presentable in a series of instances ( 100, 110, 120, 130 ). The fields include at least one of (a) a static field ( 105 ) that does not change upon each instance of the password and (b) a dynamic field ( 101, 102 ) that changes with each instance of the password based upon extrinsic data. Further, there is a "hysteresis" field (or a "dynamic field with history", 103, 104 ) which contains data that is a function of a preceding instance of the password. When a current presented instance ( 110 ) of the password is input/received, a comparison operation is performed in which the hysteresis field ( 113, 114 ) of the current presented instance of the password is compared using data retained since a prior instance of authentication of the password ( 101, 102 ). |
