Patents Assigned to GEISECKE+DEVRIENT MOBILE SECURITY GMBH
  • Method for operating a portable data carrier, and such a portable data carrier
    Patent number: 9912471
    Abstract: A method for operating a portable data carrier includes a processing unit for processing commands and a memory unit for storing data, with random wait states being inserted into the processing of the commands for thwarting SPA/DPA attacks. An actual checksum may be computed over the data of a selected region of the memory unit during a random wait state. A portable data carrier is arranged for executing the method.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: March 6, 2018
    Assignee: GEISECKE+DEVRIENT MOBILE SECURITY GMBH
    Inventor: Thomas Stocker