Patent · US Active

Monotonic counter and method of operating a monotonic counter

US10326453B2 · kind B2 · utility

1Cited by

7References

13Claims

0Family size

Assignee

NXP B.V. · NL

Inventors

Thierry G. C. Walrant · Bouge, BE
Bernd Uwe Gerhard Elend · Hamburg, DE
Andreas Bening · Königsee, DE

Key dates

Filing date	Dec 13, 2017
Grant date	Jun 18, 2019
Priority date	—
Expiry date	Feb 7, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH03K21/403
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

The present application relates to a system hosting a monotonic counter and a method of operating the system. The system comprises a non-volatile memory (110) for holding a save counter value and a volatile memory (120) for maintaining a current counter value. The system (100) is configured during a startup phase to retrieve the saved counter value of the monotonic counter from the non-volatile memory (110); to detect whether a previous shutdown of the system (100) was an uncontrolled shutdown; and to adjust the retrieved counter value in accordance with a step size (130) provided at the system (100) in case an previous uncontrolled shutdown is detected.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.