Patents by Inventor Daniel B. Shumow

Daniel B. Shumow 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).

  • Hybrid cryptographic key derivation
    Patent number: 9798677
    Abstract: Cryptographic key management and usage is accomplished by employing a hybrid symmetric/asymmetric security context wherein seed values are associated with randomly generated cryptographic keys. A security context environment is maintained wherein cryptographic keys are reliably reproduced when needed.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: October 24, 2017
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Stefan Thom, Daniel B. Shumow
  • Hybrid Cryptographic Key Derivation
    Publication number: 20160117262
    Abstract: Cryptographic key management and usage is accomplished by employing a hybrid symmetric/asymmetric security context wherein seed values are associated with randomly generated cryptographic keys. A security context environment is maintained wherein cryptographic keys are reliably reproduced when needed.
    Type: Application
    Filed: October 23, 2014
    Publication date: April 28, 2016
    Inventors: Stefan Thom, Daniel B. Shumow
  • Weighted entropy pool service
    Patent number: 7930332
    Abstract: A weighted entropy pool service system and methods. Weights are associated with entropy sources and are used to estimate a quantity of entropy contained in data from the entropy sources. An interface is optionally provided to facilitate connecting user entropy sources to the entropy pool service. The quantity of entropy contained in the system is tracked as entropy is distributed to entropy consumers. A persistent entropy pool state file stores entropy across system restarts.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: April 19, 2011
    Assignee: Microsoft Corporation
    Inventors: Tolga Acar, Daniel B. Shumow, Andrew S. Tucker, Carl M. Ellison
  • WEIGHTED ENTROPY POOL SERVICE
    Publication number: 20080256151
    Abstract: A weighted entropy pool service system and methods. Weights are associated with entropy sources and are used to estimate a quantity of entropy contained in data from the entropy sources. An interface is optionally provided to facilitate connecting user entropy sources to the entropy pool service. The quantity of entropy contained in the system is tracked as entropy is distributed to entropy consumers. A persistent entropy pool state file stores entropy across system restarts.
    Type: Application
    Filed: March 23, 2007
    Publication date: October 16, 2008
    Applicant: Microsoft Corporation
    Inventors: Tolga Acar, Daniel B. Shumow, Andrew S. Tucker, Carl M. Ellison