Abstract: A process for processing a received message, where the message includes encrypted data and at least one indicator element, is disclosed. The process includes generating a complete indicator from data stored in the electronic device and from the received indicator element, generating a key from the complete indicator, and decrypting the encrypted data using said key. The disclosure also relates to a corresponding sending process.

Abstract: A process for processing a received message, where the message includes encrypted data and at least one indicator element, is disclosed. The process includes generating a complete indicator from data stored in the electronic device and from the received indicator element, generating a key from the complete indicator, and decrypting the encrypted data using said key. The disclosure also relates to a corresponding sending process.

Abstract: A secure element and method for backup of data stored in a non-volatile memory of the secure element. The method for backup of data includes de-fragmenting an area of the non-volatile memory so as to form, in the area, an occupied region and a free region. The method further includes compressing the portion of data contained in the occupied region, after de-fragmentation, and compressing the contents of the free region using a compression algorithm that is different from the one used for compressing the portion of data contained in the occupied region. In one embodiment, the occupied region is compressed using a dictionary, and the free region is compressed by applying run-length encoding (RLE). The method also includes generating a backup image containing the compressed portion of data and the compressed contents of the free region, and writing the backup image into the nonvolatile memory. The area may contain objects to be handled by a program coded in an object language.

Abstract: The present invention notably relates to a method for saving data stored in memory in a non-volatile memory (2) of a secure element (1), the method being characterized by steps for generating a backup image (IS) containing the data stored in memory in the non-volatile memory (2) and for writing the backup image (IS) into the non-volatile memory (2) of the secure element (1). The present invention also relates to a method for restoring saved data.