Sending a cryptogram to a POS while disconnected from a network

A system is configured for detecting a point of sale, receiving a personal identification number (PIN), generating a PIN based key using a message digest of the PIN, decrypting a data encryption key (DEK) using the PIN based key, and generating a DEK based dynamic key using the PIN based key. The sy...

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Bibliographische Detailangaben
Hauptverfasser:	Deliwala, Manish K, Maddukuri, Ajay, Bhandari, Naresh, Watson, Curtis, McDonald, John G
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY PHYSICS SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION WIRELESS COMMUNICATIONS NETWORKS
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Beschreibung
Zusammenfassung:	A system is configured for detecting a point of sale, receiving a personal identification number (PIN), generating a PIN based key using a message digest of the PIN, decrypting a data encryption key (DEK) using the PIN based key, and generating a DEK based dynamic key using the PIN based key. The system may also decrypt a session key using the DEK based dynamic key, generate a cryptogram from the session key, and send the cryptogram to the point of sale.