| 摘要 |
The invention relates to a method 30 for securing an operation. The method comprises a displaying step in which a terminal displays 38 a message for entering data, a first comparing step in which a token compares 318 entered data with secret data. According to the invention, the method further comprises a marking step by which the token associates a first sequence mark with data for displaying the message for entering data; a cooperating step in which the token sends 36 to the terminal the data for displaying the message for entering data accompanied with the first sequence mark, the terminal sends 312 to the token entered data accompanied with a second sequence mark, a second comparing step, the token compares 314 the second sequence mark with the first sequence mark, and, according to comparison results, the token authorizes 320 or forbids 316 to carry out the operation. The invention relates also to corresponding token and system.
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