SECURELY LINKED MEDIA CARRYING DIFFERENT VERSIONS OF THE SAME COMPUTER CODE

摘要

A means of delivering software comprises at least two storage media comprising at least two different versions of a software program. A first version of the software program comprises a full version of the program and a second version comprises a limited version of the program. Due to the presence of identification means (28), such as a security tag, the first version of the software program can only be executed in the presence of to second storage medium (12), or vice versa. The security tag may be an RF-ID dongle. Also, a system and a method is provided, for executing data stored on a data carrier, and wherein related data are stored on two separate data carriers. At least one of the data carriers comprises identification means, and the presence of this identification means authorizes the use of one of the data carriers in one of the devices.