“ A PROCESS FOR MODIFYING THE DATA OF A MEMORY CARD DURING A TRANSACTION.“
Application 2167/DELNP/2003 published 2006-01-20, filed 2003-12-12
The invention relates to a method for modification of data in a card transaction system, comprising a memory card and a reader for reading the card. The card comprises a first memory (RAM) and a second memory (EEPROM) with locations occupied by data recordings. Each transaction involves the modification of at least one of the data locations or the addition of a new recording. The method comprises the following steps a) read (17) the address of a free location from a previous control register located in a first fixed location in the EEPROM memory, b) write (18) the new modified recording or addition in the free location, repeat steps a) and b) for each new recording to be modified or added and write (22) in a second fixed location in the EEPROM memory a new control register containing the addresses of free locations within the EEPROM memory to use in the next transaction.
Applicant
ASK S.A.
Les Bouillides, 15, Traverse des Brucs, Sophia Antipolis, F-06560 Valbonne, FRANCE
Inventor
eric gerbault
International Info
Classification: G11C 16/10
Publication Number: WO03/088262
Application Date: 2003-04-15
Priority Information
02/04705 FRANCE 2002-04-16