METHOD FOR VERIFICATION OF DECRYPTION PROCESSES

The present invention describes a verification method which allows ensuring that the decryption process has been done honestly by the entity in charge of that. The method described in this invention is characterized by basing the verification of the correctness of the decryption of a set of encrypte...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MIRET BIOSCA, Josep M, GUASCH CASTELLÓ, Sandra, PUIGGALÍ ALLEPUZ, Jorge, SEBÉ FEIXAS, Francesc
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	The present invention describes a verification method which allows ensuring that the decryption process has been done honestly by the entity in charge of that. The method described in this invention is characterized by basing the verification of the correctness of the decryption of a set of encrypted messages in a proof demonstrating that the result of the operation with an operator ¦ of blocks of encrypted messages is equal to the encryption of the result of operating with the operator blocks composed by the same messages, decrypted. In order to do that, a first input integrity proof is generated for each block of encrypted messages based on the operation ¦ of the encrypted messages, and the link with the output integrity proofs generated with the operation of the decrypted messages composing each block is verified.