| 摘要 |
The invention relates to an (auxiliary) operation of an operating unit which is directed to a signalling system. Information is generated by the signalling system, the information comprising a CAPTCHA, which information is transmitted to the operating unit. There, an operator enters the character string, in particular a transaction authentication number, portrayed in the CAPTCHA, which is transmitted to the signalling system for confirmation. If the input is correct, the operation is implemented. The advantage here is that it is possible to ensure that such an input does not originate from a machine but only from the operator. Automated undesirable operations can thus be effectively and reliably prevented. |
