| 摘要 |
The invention relates to a method, in which a digital signature (S(N3, EG)) is generated by a terminal (54) using a secret key for at least one piece of transmission data (N3). The digital signature (S(N3, EG)) is verified in a cash machine (62). If the verification is positive, a digital confirmation signature is generated by means of a secret confirmation key for the first digital signature (S(N3, EG)) and is transmitted to the terminal (54) with a message (N6). |
