Method and device for protecting dynamic random access memory
US10482039B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2016 |
| Grant date | Nov 19, 2019 |
| Priority date | — |
| Expiry date | May 5, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for DRAM protection comprises allocating address spaces respectively for a first and second common region, a first and second secure region; detecting whether common data has an address within the address spaces for the first secure region; outputting a digital signal remapping an address of the common data to the address space for the second common region if yes; detecting whether secure data has an address within the address spaces for the first common region; outputting a digital signal indicating remapping an address of the secure data to the address space for the second secure region if yes. Alternatively, the method further comprises generating a random key; an updated written data by permuting orders of bits of an original DRAM written data; generating an encrypted data by performing a function on the updated written data with the generated random key; and dynamically updating the generated random key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.