Patents Assigned to CompuGROUP Holding AG
  • Computer implemented method for authenticating a user
    Patent number: 8522011
    Abstract: The invention relates to a computer implemented method for performing a user authentication, wherein an asymmetric cryptographic key pair is associated with the user, said key pair comprising a public key and a private key, wherein the method comprises selecting the user to be authenticated using a pseudonym of said user, wherein said pseudonym comprises the public key of the user, the method further comprising performing a cryptographic authentication of the user using the asymmetric cryptographic key pair.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: August 27, 2013
    Assignee: Compugroup Holding AG
    Inventors: Adrian Spalka, Jan Lenhardt
  • Method for generating an asymmetric cryptographic key pair and its application
    Patent number: 8266435
    Abstract: The invention pertains to a method, computer readable medium, and data processing system for generation of an asymmetric cryptographic key pair including reception of an arbitrarily selectable login name, calculation of a first data object key, whereby a random value and the login name are included in the calculation, and calculation of a second data object key from the first data object key, whereby the first and second data object keys form the asymmetric cryptographic key pair.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: September 11, 2012
    Assignee: CompuGROUP Holding AG
    Inventors: Adrian Spalka, Jan Lehnhardt
  • COMPUTER IMPLEMENTED METHOD FOR GENERATING A PSEUDONYM, COMPUTER READABLE STORAGE MEDIUM AND COMPUTER SYSTEM
    Publication number: 20110154054
    Abstract: The invention relates to a computer implemented method for generating a pseudonym for a user comprising entering a user-selected secret, storing the user-selected secret in memory, computing a private key by applying an embedding and randomizing function onto the secret, storing the private key in the memory, computing a public key using the private key, the public key and the private key forming an asymmetric cryptographic key, erasing the secret and the private key from the memory, and outputting the public key for providing the pseudonym
    Type: Application
    Filed: January 20, 2010
    Publication date: June 23, 2011
    Applicant: CompuGROUP Holding AG
    Inventors: Adrian Spalka, Jan Lehnhardt
  • Data Processing System and Method for Computer Assisted Learning
    Publication number: 20080082492
    Abstract: A data processing system includes: means for accessing a medical case database; means for entering case-related data in the case database; means for accessing a medical specialty questions database; means for generating a query for the specialty questions database with the help of the case-related data; means for displaying a specialty question obtained by the query; means for entering an answer to the specialty question; and means for evaluating an answer.
    Type: Application
    Filed: September 29, 2006
    Publication date: April 3, 2008
    Applicant: CompuGroup Holding AG
    Inventor: Frank Gotthardt