Patent · US Active

Systems and methods for secure interrupt handling

US8352804B2 · kind B2 · utility

2Cited by

4References

16Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Frank Hellwig · Wunstorf, DE
Antonio Vilela · Mering, DE

Key dates

Filing date	May 20, 2010
Grant date	Jan 8, 2013
Priority date	—
Expiry date	Feb 23, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG06F13/26
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

The invention relates to systems for secure interrupt handling, a method for verifying a priority of a winning service request node and a method and an apparatus for verifying integrity of service requests.In accordance with an aspect of the invention, there is provided a method for verifying a priority of a winning service request node (SRN) established in an arbitration between a plurality of service request nodes (SRNs) performed by an interrupt controller, the method comprising: storing the priority of the winning SRN in the interrupt controller; encoding the priority of the winning SRN, wherein the encoding allows for error detection; transmitting the encoded priority from the winning SRN to the interrupt controller; and verifying the priority of the winning SRN by comparing the encoded priority transmitted by the winning SRN with the priority of the winning SRN established in the arbitration and stored in the interrupt controller.

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