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:
Sep. 15, 1998
Filed:
Aug. 14, 1997
Applicant:
Inventors:
Martin Klaas De Lange, Voorburg, NL;
Jean Paul Boly, Zoeterwoude, NL;
Assignee:
Koninklijke PTT Nederland, , NL;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ; H04K / ;
U.S. Cl.
CPC ...
380 28 ; 380 29 ; 380 44 ; 380 21 ; 380 49 ;
Abstract
A device for encrypting or decrypting data packets. The device includes two cryptographic elements. The first cryptographic element generates processing data, based on a first starting value, for use in cryptographically processing the data packet. The second cryptographic element is arranged to generate the first starting value based on a second starting value. The second starting value is based on a previously cryptographically processed data packet.