Encrypted memory device
US11403386B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2019 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | Jun 19, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2103
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one implementation, a system for detecting counterfeit accessories that are consumable, disposable, or otherwise user replaceable is disclosed. The system includes a host controller, a processor, and a computer-readable storage medium that includes instructions. Upon execution by the processor, the instructions cause the system to perform operations. The operations include obtaining an identifier of an accessory, a current value of usage data for the accessory, and a usage digest of the current value from a storage device associated with the accessory. An expected usage digest is generated based on the current value, the identifier, and a host secret. The expected usage digest is compared with the usage digest and the current value with a threshold usage value. The accessory is activated with the host controller responsive to the expected usage digest being identical to the usage digest and the current value satisfying the threshold usage value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.