Patents by Inventor Robert ENDERLEIN

Robert ENDERLEIN 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).

  • Password-based generation and management of secret cryptographic keys
    Patent number: 10057060
    Abstract: A user computer generates a secret cryptographic key through communication with a server. A secret user value is provided at the user computer. A secret server value is provided at the server with a check value which encodes the secret user value and a user password. In response to input of an input password, the user computer encodes the secret user value and the input password to produce a first value corresponding to said check value, and communicates the first value to the server. The server compares the first value and check value to check whether the input password equals the user password. If so, the server encodes the first value and secret server value to produce a second value and communicates the second value to the user computer. The user computer generates the secret cryptographic key by encoding the second value, the input password and the secret user value.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: August 21, 2018
    Assignee: International Business Machines Corporation
    Inventors: Jan Camenisch, Robert Enderlein, Stephan Krenn, Anja Lehmann, Gregory Neven
  • Password-Based Generation and Management of Secret Cryptographic Keys
    Publication number: 20170373846
    Abstract: A user computer generates a secret cryptographic key through communication with a server. A secret user value is provided at the user computer. A secret server value is provided at the server with a check value which encodes the secret user value and a user password. In response to input of an input password, the user computer encodes the secret user value and the input password to produce a first value corresponding to said check value, and communicates the first value to the server. The server compares the first value and check value to check whether the input password equals the user password. If so, the server encodes the first value and secret server value to produce a second value and communicates the second value to the user computer. The user computer generates the secret cryptographic key by encoding the second value, the input password and the secret user value.
    Type: Application
    Filed: August 18, 2017
    Publication date: December 28, 2017
    Inventors: Jan CAMENISCH, Robert ENDERLEIN, Stephan KRENN, Anja LEHMANN, Gregory NEVEN
  • Password-based generation and management of secret cryptographic keys
    Patent number: 9847877
    Abstract: Methods and apparatus are provided for generating a secret cryptographic key of a user computer connectable to a server via a network. A secret user value is provided at the user computer. A secret server value is provided at the server with a check value which encodes the secret user value and a user password. The user computer encodes the secret user value and an input password to produce a first value corresponding to said check value, and communicates the first value to the server. The server compares the first and the check values to check whether the input password equals the user password. If so, the server encodes the first and the secret server values to produce a second value and communicates the second value to the user computer. The user computer generates the secret cryptographic key by encoding the second value, the input password and the secret user value.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: December 19, 2017
    Assignee: International Business Machines Corporation
    Inventors: Jan Camenisch, Robert Enderlein, Stephan Krenn, Anja Lehmann, Gregory Neven
  • Password-Based Generation and Management of Secret Cryptographic Keys
    Publication number: 20160065366
    Abstract: Methods and apparatus are provided for generating a secret cryptographic key of a user computer connectable to a server via a network. A secret user value is provided at the user computer. A secret server value is provided at the server with a check value which encodes the secret user value and a user password. The user computer encodes the secret user value and an input password to produce a first value corresponding to said check value, and communicates the first value to the server. The server compares the first and the check values to check whether the input password equals the user password. If so, the server encodes the first and the secret server values to produce a second value and communicates the second value to the user computer. The user computer generates the secret cryptographic key by encoding the second value, the input password and the secret user value.
    Type: Application
    Filed: August 26, 2015
    Publication date: March 3, 2016
    Inventors: Jan CAMENISCH, Robert ENDERLEIN, Stephan KRENN, Anja LEHMANN, Gregory NEVEN