Method for managing memory space in a secure non-volatile memory of a secure element

摘要

The invention relates to a method for managing non-volatile memory space in a secure processor comprising a secure non-volatile internal memory, the method comprising steps of: selecting data elements to remove from the internal memory, generating, by the secure processor, a data block comprising the selected data elements, and a signature computed from the selected data elements using a secret key generated by the secure processor, transmitting the data block by the secure processor, and storing the transmitted data block in an external memory.

主权项

1. A method for managing non-volatile memory space in a secure processor comprising a secure non-volatile internal memory, the method comprising steps of:
associating an export eligibility flag with each data element in the internal memory, each eligibility flag indicating whether the associated data element is erasable from the internal memory and exportable in a data block, each time new data are inserted into the secure non-volatile internal memory, if the new data are associated with an export eligibility flag indicating that the new data are erasable, exporting the new data in one or more data blocks to an external memory, and for each data block to be exported:
generating, by the secure processor, the data block from the new data, and a signature computed from the data inserted into the data block using a secret key generated by the secure processor,transmitting the data block by the secure processor to store the data block in an external memory, andstoring the transmitted data block in the external memory.