Patents by Inventor Wolfgang Klasen

Wolfgang Klasen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Communication system, method for registering a communication relationship and gateway computer
    Patent number: 7787441
    Abstract: A communication system is proposed which, as its communication elements (KE) has a gatekeeper (GK), a gateway (GW) coupled to the gatekeeper (GK) and at least one communication unit (KEH) coupled to the gateway (GW), with the communication system being set up so that, to register a communication relationship of the communication unit (KEH) in the communication system (KS), a request message (ANF) is transmitted from the communication unit (KEH) via the gateway (GW) to the gatekeeper (GK), which is checked in the gateway (GW) for authenticity and in the gatekeeper (GK) for authorization.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: August 31, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jens-Uwe Buβer, Markus Böhm, Steffen Fries, Wolfgang Klasen
  • Method and arrangement for data communication in a cryptographic system containing a plurality of entities
    Patent number: 7290135
    Abstract: A method for data communication in a cryptographic system containing a plurality of entities is specified, in which the entities are arranged in a hierarchical structure. If a current entity in the structure is altered, those entities which are connected directly to the current entity's hierarchically superordinate entity are notified of the alteration.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: October 30, 2007
    Assignee: Siemens Aktiengesellschaft
    Inventors: Steffen Fries, Wolfgang Klasen, Gerald Volkmann
  • Communication system, method for registering a communication relationship and gateway computer
    Publication number: 20050169251
    Abstract: A communication system is proposed which, as its communication elements (KE) has a gatekeeper (GK), a gateway (GW) coupled to the gatekeeper (GK) and at least one communication unit (KEH) coupled to the gateway (GW), with the communication system being set up so that, to register a communication relationship of the communication unit (KEH) in the communication system (KS), a request message (ANF) is transmitted from the communication unit (KEH) via the gateway (GW) to the gatekeeper (GK), which is checked in the gateway (GW) for authenticity and in the gatekeeper (GK) for authorization.
    Type: Application
    Filed: January 25, 2005
    Publication date: August 4, 2005
    Inventors: Jens-Uwe Busser, Markus Bohm, Steffen Fries, Wolfgang Klasen
  • Device and method for the cryptographic processing of a digital data stream presenting any number of data
    Patent number: 6542607
    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).
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: April 1, 2003
    Assignee: Siemens Aktiengesellschaft
    Inventors: Martin Euchner, Wolfgang Klasen
  • Method and arrangement for data communication in a cryptographic system containing a plurality of entities
    Publication number: 20020154780
    Abstract: A method for data communication in a cryptographic system containing a plurality of entities, includes the entities arranged in a hierarchical structure. If a current entity in the hierarchical structure is altered, those entities which are on the same hierarchical level as the current entity, and which are connected to the current entity's superordinate entity, are notified of the alteration.
    Type: Application
    Filed: March 29, 2002
    Publication date: October 24, 2002
    Inventors: Steffen Fries, Wolfgang Klasen, Gerald Volkmann
  • Method and arrangement for data communication in a cryptographic system containing a plurality of entities
    Publication number: 20020144112
    Abstract: A method for data communication in a cryptographic system containing a plurality of entities is specified, in which the entities are arranged in a hierarchical structure. If a current entity in the structure is altered, those entities which are connected directly to the current entity's hierarchically superordinate entity are notified of the alteration.
    Type: Application
    Filed: March 29, 2002
    Publication date: October 3, 2002
    Inventors: Steffen Fries, Wolfgang Klasen, Gerald Volkmann
  • Process for group-based cryptographic code management between a first computer unit and group computer units
    Patent number: 6052787
    Abstract: A group-based cryptographic code management method is proposed, in which a security policy which is used in a further communication is negotiated between group computer units and a first computer unit.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: April 18, 2000
    Assignee: Siemens Aktiengesellschaft
    Inventors: Martin Euchner, Wolfgang Klasen, Volker Kessler