Patent · US Expired

Device and method for the cryptographic processing of a digital data stream presenting any number of data

US6542607B1 · kind B1 · utility

7Cited by

2References

26Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Martin Euchner · Hersbruck, DE
Wolfgang Klasen · Ottobrunn, DE

Key dates

Filing date	Feb 23, 1999
Grant date	Apr 1, 2003
Priority date	—
Expiry date	Feb 23, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/125
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A digital data stream comprises an arbitrary number of data block (Pn). For a data block, a first processing element (B1n) is provided that contains at least one first logic unit (VK1), an encryption unit (Ek), and a second logic unit (VK2). With the first logic unit (VK1), the respective data packet (Pn), at least one preceding data packet (Pn−1), and a preceding intermediate quantity (In−1) are combined and are encrypted in the encryption unit (Ek) to form the intermediate quantity (In).The intermediate quantity (In) is combined with a preceding cryptographically processed data block (Cn−l) to form the cryptographically processed data block (Cn).

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