On modern systems like Nayax you can’t do this because the token simply identify you as the owner of the on-line account and the credit is stored there… If you can READ the entire COGES not just the UID and write it back you will be able to have illimited credit even if you don’t edit the data, simply charge your key with 10€, read it and when cretit goes out write the info to the key again as it was with the 10€. Unlike systems like Nayax that store the credit info on-line and your card/token is linked to the online account on COGES you have the data/credit stored on the KEY …įirst versions of the key had a eeprom on them … There was a spanish guy that accessed the chip and dump it out and edited it and had a huge amount of credit … This does bring back memories … 10 years ago they were very popular …
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