Patent ID: 6233340
Filing Date: 2001-05-15
Classification: G06Q,G07D,G09C,H04L

Abstract:
A process for enhancing the security of a cheque, comprising:selecting information, A, found on the cheque wherein said selected information varies for each instantiation of the cheque presented by the same payor;selecting an encryption key not associated with information found on the cheque;encrypting a combination of the selected information and the encryption key with a practicably irreversible cryptographic scheme to thereby generate a first control code;printing the selected information and the first control code on the cheque;reading the selected information from the cheque;encrypting a combination of the read information and the encryption key with the encryption scheme to thereby generate a second control code; andcomparing the first control code with the second control code and refusing to honour the cheque if the first and second control codes are not identical.