Access to a processing device
US8370923B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 2008 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Feb 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2149
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Authorizing access to one or more restricted functions provided by a processing device is described. A method for authorizing such access comprises: reading at least one time from a clock associated with the processing device; storing the read time as a reference time; after the read time is stored, reading another time (a current time) from the clock. The method also includes comparing the reference time with the current time; reading a trend status associated with the reference time; and authorizing access to the restricted functions provided by the processing device if an acceptance criterion is satisfied. The acceptance criterion may require (i) the read current time to be chronologically earlier than the reference time and the trend status to be trusted backward mode, or (ii) the read current time to be chronologically later than the reference time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.