METHOD FOR DEACTIVATING A PAYMENT MODULE, CORRESPONDING COMPUTER PROGRAM PRODUCT, STORAGE MEDIUM AND PAYMENT MODULE

摘要

The invention concerns a method for deactivating a payment module attachable to a communications terminal, comprising: .cndot. a phase for deactivating comprising at least one step for erasing the main memory of said payment module with the exception of a non-volatile memory zone in which an encryption key k is stored, said encryption key k being available only when said main memory is empty; .cndot. a phase for verifying comprising: .circle. a step for verifying that said main memory is empty, delivering a positive or negative result of verification; .circle. if said result of verification is positive: .cndot. a step for computing a response to a challenge preliminarily received by said payment module from an entity distinct from said payment module, said computation being implemented by means of said encryption key k; .cndot. a step for transmitting said response to said entity.