Patents by Inventor Frans List

Frans List 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).

  • Security storage of electronic keys within volatile memories
    Patent number: 8199912
    Abstract: It is described a method for providing an electronic key within an integrated circuit (100) including both a volatile memory (102) and a non-volatile memory (104). The described comprises starting up the integrated circuit (100), reading the logical state of predetermined data storage cells (102a) assigned to the volatile memory (102), which data storage cells (102a) are characterized that with a plurality of start up procedures they respectively adopt the same logical state, and generating an electronic key by using the logical state of the predetermined data storage cells (102a). Preferably, the predetermined data storage cells (102a) are randomly distributed within the volatile memory (102). It is further described an integrated circuit (100) for providing an electronic key.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: June 12, 2012
    Assignee: NXP B.V.
    Inventors: Pim Tuyls, Maarten Vertregt, Hans De Jong, Frans List, Mathias Wagner, Frank Zachariasse, Arjan Mels
  • SECURITY STORAGE OF ELECTRONIC KEYS WITHIIN VOLATILE MEMORIES
    Publication number: 20090164699
    Abstract: It is described a method for providing an electronic key within an integrated circuit (100) including both a volatile memory (102) and a non-volatile memory (104). The described comprises starting up the integrated circuit (100), reading the logical state of predetermined data storage cells (102a) assigned to the volatile memory (102), which data storage cells (102a) are characterized that with a plurality of start up procedures they respectively adopt the same logical state, and generating an electronic key by using the logical state of the predetermined data storage cells (102a). Preferably, the predetermined data storage cells (102a) are randomly distributed within the volatile memory (102). It is further described an integrated circuit (100) for providing an electronic key.
    Type: Application
    Filed: February 15, 2007
    Publication date: June 25, 2009
    Applicant: NXP B.V.
    Inventors: Pim Tuyls, Maarten Vertregt, Hans De Jong, Frans List, Mathias Wagner, Frank Zachariasse, Arjan Mels