Abstract: The invention relates to a portable token equipped with non-volatile memory, the token comprising authentication means to authenticate a holder of the token, authorization means to define the rights of the holder, and payment means to trigger a payment transaction. The authorization means are set to store the rights in non-volatile memory after the authentication means are invoked, and the payment means have the capacity to retrieve the rights from non-volatile memory, and to subject the execution of the payment transaction to the verification of the rights. The invention also relates to a related portable device, to a system comprising a portable token and a portable token, and to a method for carrying out a payment transaction with a portable token.

Abstract: The invention concerns a device to secure the data areas of a memory in an electronic component, the said component being able to modify the said data areas.