Security method for protecting a system, e.g. a computer or online system against unauthorized access, whereby a computer is used with a chip card reader, with an additional varying control question used for access authentication

摘要

Method for securing a system against unauthorized access, whereby an input device is used to input a value that is compared with a stored input code in order to provide access to a system. Following input of the code, e.g. a PIN, a further control question is asked via a system output unit, e.g. the monitor. The question includes information for providing the answer and the user must input the correct answer before access is granted. The invention also relates to a system for implementing the method that comprises a computer with a chip card reader. The information displayed in the additional control question changes each time an identification chip card is inserted in the reader.