Transaction system of the electronic purse type

摘要: A card (2) having a memory microcircuit (20) with access thereto under the control of hard-wired logic circuit or microprocessor (21) is suitable for cooperating terminal (1). in EPROM technology (or E 2 PROM technology) includes value words (e.g., thirty-two bit comprising twenty-five bits, four bits coding each bit, and verification bit). By loading plurality into meory so as to set up sequence units spread over successive powers 2, calculation means can split amount any transaction less than maximum binary form very simply, then consume not more one per unit (optionally other most significant unit) respect transaction.