Electronic password card for automatically generating alternating character sequences for logging-on EDP users for the authorisation check in EDP systems

摘要

The safety precautions for protecting EDP systems and stored data are based on methods which allow the identification of an EDP user as a person authorised to use the system. The methods used range from the simple password check to the use of a code card. The electronic password card can be used device-independently, does not need a reader at the EDP operating device and can be inserted into existing EDP applications. By inputting a personal password and the indicated character sequence of the electronic password card, the authorisation for use can be tested and, at the same time, the identity of the password card owner determined in the EDP system. The character sequence alternating in short intervals, and thus also the alternating overall password, protects the method to a special extent against unauthorised use of EDP systems and stored data.