Method For Checking Whether Program Instructions Have Been Executed By A Portable Terminal


Ontology type: sgo:Patent     


Patent Info

DATE

2011-11-17T00:00

AUTHORS

BAUER, SVEN

ABSTRACT

The invention relates to a method and system for checking whether program instructions (13) have been executed by a terminal (1). For this purpose, the terminal requests program instructions (13), wherein the program instructions (13) have been stored in executable form in a trustworthy entity (3), in particular a chip card. Subsequently, the program instructions (13) in the trustworthy entity (3) are variably modified in such a way that the modified program instructions vary with each execution of the method. By executing the instructions in the terminal (1), a test value (9a) is obtained which in turn is transmitted to the trustworthy entity (3) and is verified in the trustworthy entity. More... »

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