Memory transformation apparatus and method
US5095525A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1989 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | Jun 26, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/1408
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer memory is transformed such that a data word to be sent to an address is transformed into a transformed data word, and the address to which it is to be sent is transformed to a transformed address. Such transformations are by inversion and permutation of the memory lines (address or data). The data transformation process depends on the address. The data inverse transformation process also depends on the address, but there is no address inverse transformation process. The invention may be used whenever it is desired to more nearly equalize the use of all the bits of the memory, or to impede unauthorized persons from extracting the virtual addresses and data from the transformed addresses and data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.