The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2005
Filed:
Sep. 20, 1999
Uwe Hansmann, Altdorf, DE;
Frank Seliger, Hildrizhausen, DE;
Uwe Hansmann, Altdorf, DE;
Frank Seliger, Hildrizhausen, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Described is a mechanism for securely handling an information unit by a first information processing device (), for instance a terminal device like a chip card reader, which interoperates with a second secure information processing device (), for instance a portable device like a chip card, whereby the information unit is provided by an issuer. The information unit is provided from the issuer to the first device and encrypted by using a first key. The first key is also encrypted by using a second key. The second key is provided on the second secure device () and interconnecting the first and the second device enables to decrypt the first key by using the second key and then to decrypt the information unit by using the first key.