| 摘要 |
The present invention relates to a method of access to the assembly of the cells of a memory area for the purposes of writing or reading blocks of data in said cells, said method comprising, for each of the access times (Ti with i = 0 to N) for accessing said cells of said memory area to be accessed, a process for determining the address (ADRj, with j = 0 to N), of the cell of the memory area to be accessed at the said access time (Ti), an address (ADRj) determined for an access time (Ti) not being determined again for another access time (Tk, k≠j). According to the invention, said method is characterized in that said process for determining each address (ADRj) is a pseudorandom process. The present invention finds a particular relevance, for example, in any type of card, chip card, SIM card etc. which comprises a processing unit, such as a microcontroller, for manipulating cryptographic data serving for the identification and/or the authentication of a user of such a card. |
