| 摘要 |
The invention relates to a method to manage physical volatile memory storing sensitive data relative to a cryptography algorithm process, said method comprising an initial step (E0) of defining a plurality of logical sub-buffers (Bi) ordered in a logical layout (LLyt) intended to include in physical volatile memory sensitive data relative to the cryptography algorithm process, and said method comprising, before each run of the cryptography algorithm process, the following steps:
- constructing (E1) a random permutation table (PT(Bi)) for the sub-buffers (Bi),
- recording (E3), in an address table (AT(Bi)), the physical address of each sub-buffer (Bi) obtained after permutation,
said method then implying the running of the sensitive process by accessing the sub-buffers' contents as ordered in a logical layout (LLyt) using the address table (AT(Bi)) to call the corresponding physical addresses, then each time of run the algorithm will access different sub-buffers' physical addresses. |
