Patents by Inventor Tero Koskivirta

Tero Koskivirta 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).

  • Method and apparatus for authentication of data using different hash functions and feedback
    Patent number: 7702097
    Abstract: A method and apparatus for authentication of data includes inputting of data into a first layer of a hashing function for rotation based hashing, then inputting results from the first layer to a second layer of the hashing function for substitution based hashing. Feedback is provided from the second layer to the first layer and digests are output from the first and second layers.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: April 20, 2010
    Assignee: Nokia Siemens Networks Oy
    Inventors: Fan Yang, Tero Koskivirta, Timo Knuutila
  • Mobility within a packet-switched telephony network
    Patent number: 7502339
    Abstract: According to an embodiment of the present invention, a system is provided that includes a cellular network, a Public Switched Telephone Network (PSTN) and a mobile IP-telephony network (MIPTN). Both the cellular network and the MIPTN include a Home Function and one or more visited Functions. MIPTN subscribers can roam within the MIPTN. Also, a Gateway Function interfaces the PSTN and the MIPTN to allow roaming between the cellular network and the MIPTN. The Gateway Function performs a dynamic mapping function between PSTN/cellular addresses (e.g., in E.164 format) and MIPTN addresses (e.g., IP addresses) to allow registration and call delivery for subscribers roaming between the cellular network and the MIPTN. A similar type of Gateway Function also allows Short Message Service (SMS) messages to be delivered over the MIPTN as well.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: March 10, 2009
    Assignee: Nokia Telecommunications Oyj
    Inventors: Juha Matti Pirkola, Heikki Juhani Einola, Marko Juhani Suoknuuti, Aki Petteri Mikkonen, Tero Koskivirta, Jukka-Pekka Saunamäki, Pekka Tapio Pessi
  • Authentication of data
    Publication number: 20040236695
    Abstract: A method and apparatus for authentication of data includes inputting of data into a first layer of a hashing function for rotation based hashing, then inputting results from the first layer to a second layer of the hashing function for substitution based hashing. Feedback is provided from the second layer to the first layer and digests are output from the first and second layers.
    Type: Application
    Filed: August 14, 2003
    Publication date: November 25, 2004
    Applicant: Nokia Corporation
    Inventors: Fan Yang, Tero Koskivirta, Timo Knuutila
  • Short message service support over a packet-switched telephony network
    Patent number: 6611516
    Abstract: According to an embodiment of the present invention, a system is provided that includes a cellular network, a Public Switched Telephone Network (PSTN) and a mobile IP-telephony network (MIPTN). Both the cellular network and the MIPTN include a Home Function and one or more visited Functions. MIPTN subscribers can roam within the MIPTN. Also, a Gateway Function interfaces the PSTN and the MIPTN to allow roaming between the cellular network and the MIPTN. The Gateway Function performs a dynamic mapping function between PSTN/cellular addresses (e.g., in E.16440 format) and MIPTN addresses (e.g., IP addresses) to allow registration and call delivery for subscribers roaming between the cellular network and the MIPTN. A similar type of Gateway Function also allows Short Message Service (SMS) messages to be delivered over the MIPTN as well.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: August 26, 2003
    Assignee: Nokia Telecommunications Oyj
    Inventors: Juha Matti Pirkola, Heikki Juhani Einola, Jarmo Johannes Virtanen, Aki Petteri Mikkonen, Tero Koskivirta