Patent · US Active

Apparatus and method for recognizing a failure of a cryptographic unit

US8781114B2 · kind B2 · utility

1Cited by

6References

31Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Berndt Gammel · Borgo San Lazzaro, DE
Michael Goessel · Roter Dudel, DE
Rainer Goettfert · Taufkirchen, DE

Key dates

Filing date	Sep 7, 2005
Grant date	Jul 15, 2014
Priority date	—
Expiry date	Sep 21, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04L9/0631
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

An apparatus for recognizing a failure in a cryptographic unit, wherein the cryptographic unit includes a determinator for determining an input control signal and an output control signal, with the determinator being formed to determine the input control signal on the basis of an encryption of an input control signal parity of a group of input signals or an input signal of the group of input signals with an encryption number and to determine the output control signal on the basis of an encryption of an output control signal parity of a group of the output signals or an output signal of the group of output signals with the encryption number. Furthermore, the apparatus for recognizing includes an evaluator for evaluating the input control signal and the output control signal to recognize a failure of the cryptographic unit on the basis of a comparison between the input control signal and the output control signal.

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