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  • 1 Universität Karlsruhe IAKS, Fakultät für Informatik, Arbeitsgruppe Systemsicherheit, Prof. Dr. Th. Beth Am Fasanengarten 5 76131 Karlsruhe Germany Am Fasanengarten 5 76131 Karlsruhe Germany
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Abstract  

We demonstrate that in the present form the public key cryptosystem suggested by A. Pethő in [Pet91] is insecure – even if the additional restriction from [Laš92] is imposed: using elementary linear algebra over the integers the private key or an equivalent decryption key can often be revealed easily.

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