Patent · US Expired

Certification of cryptographic keys for chipcards

US6076162A · kind A · utility

22Cited by

8References

16Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Michael Deindl · Lörrach, DE
Walter Hanel · Stony Brook, US
Albert Schaal · Lörrach, DE

Key dates

Filing date	Jan 21, 1998
Grant date	Jun 13, 2000
Priority date	—
Expiry date	Jan 21, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH04L9/3263
WIPO fieldControl
WIPO sectorInstruments

Abstract

The invention relates to a procedure for the certification of cryptographic keys for use in chipcards. In this procedure, a certification key and a certificate are transferred to the chipcard. The first part of the certificate includes the cryptographic key and the second part of the certificate includes a digital signature of the first part of the certificate. The digital certificate is subsequently checked by means of the certification key on the chipcard.

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