Secret codes are produced by an application-specific integrated circuit from a password or supervisory code and the numbers of the accounts held by customers of the bank, to whom the individual codes are communicated. When a cheque is tendered in payment the account number is read from its CMC7 code by the chip and compared with the secret code introduced into the trader's cheque processor by the person tendering.

Cheque processing using chip-generated individual secret codes

A method for securely generating a PIN (50) comprises generating a number of random binary bits (24); determining the least significant bits of the number of bits; converting the least significant bits to a decimal integer; shifting (46) the value of the integer by a predetermined constant to produce a shifted integer; and encoding (48) the shifted integer as bits in a PIN (50) block in accordance with a standard.

Generation and management of customer pin's

A method for checking and processing bank cheques, wherein a secret code is computed, in the form of a CMC7 code thereof, and from an account number read off a cheque submitted for payment, by a dedicated chip (ASIC) in a cheque processing device held by a payee, then compared with a secret code input into the device by the check issuer to determine whether he or she is the rightful account holder. The secret codes sent to bank account holders by a banking institution are generated by the same dedicated chip (ASIC) using an unknown coding polynomial and on the basis of a password or supervising code and the bank account numbers of the customers of said banking institution.

Device and method for checking and processing bank cheques

The invention relates to a transcoder for monitoring the process of reading/comparison of a coded document. The subject of the invention is a transcoder for monitoring the process of reading/comparison of a coded document 1, in which, with the aid of a reading and comparison machine 2, a coded transcription of a secret combination, carried by the document, is read, on the one hand, and, on the other hand, a combination inserted into the machine by the bearer of the document is transcribed, and the two transcriptions are compared with a view to determining whether there is agreement or not, the said transcoder being characterised in that it consists of an intelligent unit 4, linked to the said read/comparison machine 2 while being capable of communicating with the latter as well as with the said document 1, the said transcoder 4 being removable at least partially, and short-lived. Application to the checking of coded documents.

Transcoder for monitoring the process of reading/comparison of a coded document

A method for generating a personal identification number (PIN), made up of a number of N decimal digits, to be used for money cards and other devices requiring security, from a binary number having L digits, in particular from a binary code specific to an individual, the PINs are generated such that they are randomly uniformly distributed over the available number domain.

Method for generating identification numbers

The invention relates to a method and a machine for checking the legality of issue of a bank or postal cheque with a view to allowing the payee to detect a stolen cheque The machine comprises a microprocessor ( mu P), means for acquiring the account number inscribed on the cheque (MG), means for conversion into binary ( mu P), logic calculation means (CAL) adapted to make the foregoing set of holder account numbers in a binary base correspond to the image set of the binary numbers with at most 14 bits, a decimal input system (CL) for insertion of a confidential four-number decimal code, means of conversion of the code into binary base (CV), means of temporary memory storage for the said code (RAM), logic means (COMP) for comparison of the result issued by the calculating means and of the memory-stored binary base code, and warning means AFF; SON; LA3; LA4 for interpreting the results of the comparison in a simple form

Manuel Cassado

Papers

Method and machine for checking bank or postal cheques