Apparatus and a method for security authorization using a security key installed on removable media
US6944769B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2000 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Jan 14, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/51
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and a method in a data processing system are provided for insuring the security of data accessed from removable media. Normal virus scanning occurs after data is loaded into the main memory, but infection by a virus may have already occurred by this time. Therefore, it would be beneficial to check for possible virus infection before the data is transferred to main memory. A security key is read from the removable media. As encrypted data is read from the device, it is decrypted using the security key and then re-encrypted using the same security key to produce new data. The original data is accepted and sent to main memory if it is identical to the new data produced by decryption and re-encryption. If the two sets of data are not identical, then the data transmission from the device is aborted and all data on the removable media is rejected. The decryption/re-encryption checking is performed in hardware and so it can occur in real time. This hardware could be on the device controller, a separate security card, the mother board, or anywhere along the data path from the device controller to the main memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.