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:
Mar. 30, 2010
Filed:
Feb. 25, 2004
Thomas Birkhoelzer, Radolfzell, DE;
Frank Krickhahn, Herzogenaurach, DE;
Juergen Vaupel, Weisendorf, DE;
Thomas Birkhoelzer, Radolfzell, DE;
Frank Krickhahn, Herzogenaurach, DE;
Juergen Vaupel, Weisendorf, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method is for the encryption and decryption of data by various users, in which a user is assigned a data key for encrypting and decrypting data. A data processing facility is designed to carry out the method and a storage medium is designed to store information for carrying out the method on a data processing facility. A first step involves the performance of a security check in order to ascertain the identity of the user. A second step involves a data key which cannot be viewed by the user, being assigned on the basis of the result of the security check. In this case, various users who, by way of example, can be associated with a common user group, can be assigned the same data key.