Patents by Inventor Stephen G. MITCHELL

Stephen G. MITCHELL 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).

  • Patent number: 12124594
    Abstract: This disclosure relates to, among other things, electronic device security systems and methods. Certain embodiments disclosed herein provide for protection of cryptographic keys and/or associated operations using both an operating system security service and a software-based whitebox cryptographic security service executing on a device. Leveraging operating system security services and software-based whitebox cryptographic security services may provide enhanced security when compared to using either service alone to protect cryptographic keys and associated operations. In additional embodiments, server-side cryptographic security solutions may be further used to enhance device security implementations.
    Type: Grant
    Filed: January 6, 2023
    Date of Patent: October 22, 2024
    Inventors: Yutaka Nagao, Stephen G. Mitchell, Vishisht Tiwari, Rohaan Advani
  • Patent number: 12070455
    Abstract: The present disclosure relates generally to certain compounds, pharmaceutical compositions comprising said compounds, and methods of making and using said compounds and pharmaceutical compositions. The compounds and compositions provided herein may be used for the treatment or prevention of an autoimmune disease and/or inflammatory condition, including systemic lupus erythematosus and cutaneous lupus erythematosus.
    Type: Grant
    Filed: September 8, 2022
    Date of Patent: August 27, 2024
    Assignee: Gilead Sciences, Inc.
    Inventors: Stephen E. Ammann, Eda Y. Canales, Weng K. Chang, Henok H. Kinfe, Scott E. Lazerwith, Michael L. Mitchell, Yasamin Moazami, Scott D. Schroeder, Daniel G. Shore
  • Patent number: 12050904
    Abstract: Systems and methods are described that use software diversification techniques to improve the security of mobile applications. Embodiments of the disclosed systems and methods may, among other things, facilitate secure application distribution through deployment of diverse of applications in an application distribution channel. Software diversification consistent with certain disclosed embodiments may mitigate large-scale automated circumvention of security protections by presenting attacking malware moving and/or otherwise unpredictable diverse targets.
    Type: Grant
    Filed: July 23, 2021
    Date of Patent: July 30, 2024
    Assignee: Intertrust Technologies Corporation
    Inventors: Stephen G. Mitchell, Gilles Boccon-Gibod
  • Publication number: 20240106809
    Abstract: Systems and methods are described that use cryptographic techniques to improve the security of applications executing in a potentially untrusted environment associated with a software application. Embodiments of the disclosed systems and methods may, among other things, facilitate cryptographic operations within an execution environment associated with browser software of a client system while maintaining security of cryptographic keys imported into the environment. As the security of keys is maintained in an execution environment implementing embodiments of the disclosed systems and methods, users and/or systems may be more willing to consign their keys for use in connection with cryptographic operations performed in such environments.
    Type: Application
    Filed: December 6, 2023
    Publication date: March 28, 2024
    Inventor: Stephen G. Mitchell
  • Publication number: 20240063999
    Abstract: This disclosure relates to systems and methods for performing cryptographic operations in connection with the management of electronic content using multiple license services. In some circumstances, a content service may not wish to share unencrypted content keys with a single license service for a variety of security reasons. Embodiments of the disclosed systems and methods may use multi-party cryptographic methods in connection with the management of protected content keys and/or associated licenses and/or the distribution of content keys and/or licenses to authorized users and/or devices. In various embodiments, a content service may split a content key into a plurality of key shares and may transmit the key shares to a plurality of different license services. The license services may coordinate operations to generate a protected content key without revealing unencrypted content key to any of the participating license services.
    Type: Application
    Filed: November 1, 2023
    Publication date: February 22, 2024
    Applicant: Intertrust Technologies Corporation
    Inventors: Stephen G. Mitchell, Vanishree Rao
  • Publication number: 20230409700
    Abstract: The disclosure relates to systems and methods for managing state using relatively small assistance from protected hardware. Obfuscated code segments may communicate with supporting protected hardware, store encrypted state values in main memory, and/or communicate via secure channels to secure platform hardware components. In various embodiments, consistent state may be achieved, at least in part, by computing secure tag information and storing the secure tag information in a secure and/or otherwise protected device register. Consistent with embodiments disclosed herein, the tag information may be used to derive keys used to encrypt and/or decrypt stored state information. Tag information may further be used in connection with verification operations prior to using the information to derive associated keys.
    Type: Application
    Filed: August 30, 2023
    Publication date: December 21, 2023
    Applicant: Intertrust Technologies Corporation
    Inventor: Stephen G. Mitchell
  • Patent number: 11848922
    Abstract: Systems and methods are described that use cryptographic techniques to improve the security of applications executing in a potentially untrusted environment associated with a software application. Embodiments of the disclosed systems and methods may, among other things, facilitate cryptographic operations within an execution environment associated with browser software of a client system while maintaining security of cryptographic keys imported into the environment. As the security of keys is maintained in an execution environment implementing embodiments of the disclosed systems and methods, users and/or systems may be more willing to consign their keys for use in connection with cryptographic operations performed in such environments.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: December 19, 2023
    Assignee: Intertrust Technologies Corporation
    Inventor: Stephen G. Mitchell
  • Patent number: 11843686
    Abstract: This disclosure relates to systems and methods for performing cryptographic operations in connection with the management of electronic content using multiple license services. In some circumstances, a content service may not wish to share unencrypted content keys with a single license service for a variety of security reasons. Embodiments of the disclosed systems and methods may use multi-party cryptographic methods in connection with the management of protected content keys and/or associated licenses and/or the distribution of content keys and/or licenses to authorized users and/or devices. In various embodiments, a content service may split a content key into a plurality of key shares and may transmit the key shares to a plurality of different license services. The license services may coordinate operations to generate a protected content key without revealing unencrypted content key to any of the participating license services.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: December 12, 2023
    Assignee: Intertrust Technologies Corporation
    Inventors: Stephen G. Mitchell, Vanishree Rao
  • Patent number: 11783027
    Abstract: The disclosure relates to systems and methods for managing state using relatively small assistance from protected hardware. Obfuscated code segments may communicate with supporting protected hardware, store encrypted state values in main memory, and/or communicate via secure channels to secure platform hardware components. In various embodiments, consistent state may be achieved, at least in part, by computing secure tag information and storing the secure tag information in a secure and/or otherwise protected device register. Consistent with embodiments disclosed herein, the tag information may be used to derive keys used to encrypt and/or decrypt stored state information. Tag information may further be used in connection with verification operations prior to using the information to derive associated keys.
    Type: Grant
    Filed: December 1, 2021
    Date of Patent: October 10, 2023
    Assignee: Intertrust Technologies Corporation
    Inventor: Stephen G. Mitchell
  • Publication number: 20230153445
    Abstract: This disclosure relates to, among other things, electronic device security systems and methods. Certain embodiments disclosed herein provide for protection of cryptographic keys and/or associated operations using both an operating system security service and a software-based whitebox cryptographic security service executing on a device. Leveraging operating system security services and software-based whitebox cryptographic security services may provide enhanced security when compared to using either service alone to protect cryptographic keys and associated operations. In additional embodiments, server-side cryptographic security solutions may be further used to enhance device security implementations.
    Type: Application
    Filed: January 6, 2023
    Publication date: May 18, 2023
    Applicant: Intertrust Technologies Corporation
    Inventors: Yutaka Nagao, Stephen G. Mitchell, Vishisht Tiwari, Rohaan Advani
  • Patent number: 11550933
    Abstract: This disclosure relates to, among other things, electronic device security systems and methods. Certain embodiments disclosed herein provide for protection of cryptographic keys and/or associated operations using both an operating system security service and a software-based whitebox cryptographic security service executing on a device. Leveraging operating system security services and software-based whitebox cryptographic security services may provide enhanced security when compared to using either service alone to protect cryptographic keys and associated operations. In additional embodiments, server-side cryptographic security solutions may be further used to enhance device security implementations.
    Type: Grant
    Filed: March 9, 2021
    Date of Patent: January 10, 2023
    Assignee: Intertrust Technologies Corporation
    Inventors: Yutaka Nagao, Stephen G. Mitchell, Vishisht Tiwari, Rohaan Advani
  • Publication number: 20220092175
    Abstract: The disclosure relates to systems and methods for managing state using relatively small assistance from protected hardware. Obfuscated code segments may communicate with supporting protected hardware, store encrypted state values in main memory, and/or communicate via secure channels to secure platform hardware components. In various embodiments, consistent state may be achieved, at least in part, by computing secure tag information and storing the secure tag information in a secure and/or otherwise protected device register. Consistent with embodiments disclosed herein, the tag information may be used to derive keys used to encrypt and/or decrypt stored state information. Tag information may further be used in connection with verification operations prior to using the information to derive associated keys.
    Type: Application
    Filed: December 1, 2021
    Publication date: March 24, 2022
    Applicant: Intertrust Technologies Corporation
    Inventor: Stephen G. Mitchell
  • Publication number: 20220078168
    Abstract: Systems and methods are described that use cryptographic techniques to improve the security of applications executing in a potentially untrusted environment associated with a software application. Embodiments of the disclosed systems and methods may, among other things, facilitate cryptographic operations within an execution environment associated with browser software of a client system while maintaining security of cryptographic keys imported into the environment. As the security of keys is maintained in an execution environment implementing embodiments of the disclosed systems and methods, users and/or systems may be more willing to consign their keys for use in connection with cryptographic operations performed in such environments.
    Type: Application
    Filed: November 18, 2021
    Publication date: March 10, 2022
    Applicant: Intertrust Technologies Corporation
    Inventor: STEPHEN G. MITCHELL
  • Patent number: 11232195
    Abstract: The disclosure relates to systems and methods for managing state using relatively small assistance from protected hardware. Obfuscated code segments may communicate with supporting protected hardware, store encrypted state values in main memory, and/or communicate via secure channels to secure platform hardware components. In various embodiments, consistent state may be achieved, at least in part, by computing secure tag information and storing the secure tag information in a secure and/or otherwise protected device register. Consistent with embodiments disclosed herein, the tag information may be used to derive keys used to encrypt and/or decrypt stored state information. Tag information may further be used in connection with verification operations prior to using the information to derive associated keys.
    Type: Grant
    Filed: July 29, 2020
    Date of Patent: January 25, 2022
    Assignee: Intertrust Technologies Corporation
    Inventor: Stephen G. Mitchell
  • Publication number: 20210390189
    Abstract: This disclosure relates to, among other things, electronic device security systems and methods. Certain embodiments disclosed herein provide for protection of cryptographic keys and/or associated operations using both an operating system security service and a software-based whitebox cryptographic security service executing on a device. Leveraging operating system security services and software-based whitebox cryptographic security services may provide enhanced security when compared to using either service alone to protect cryptographic keys and associated operations. In additional embodiments, server-side cryptographic security solutions may be further used to enhance device security implementations.
    Type: Application
    Filed: March 9, 2021
    Publication date: December 16, 2021
    Applicant: Intertrust Technologies Corporation
    Inventors: Yutaka Nagao, Stephen G. Mitchell, Vishisht Tiwari, Rohaan Advani
  • Patent number: 11196724
    Abstract: Systems and methods are described that use cryptographic techniques to improve the security of applications executing in a potentially untrusted environment associated with a software application. Embodiments of the disclosed systems and methods may, among other things, facilitate cryptographic operations within an execution environment associated with browser software of a client system while maintaining security of cryptographic keys imported into the environment. As the security of keys is maintained in an execution environment implementing embodiments of the disclosed systems and methods, users and/or systems may be more willing to consign their keys for use in connection with cryptographic operations performed in such environments.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: December 7, 2021
    Assignee: Intertrust Technologies Corporation
    Inventor: Stephen G. Mitchell
  • Publication number: 20210349712
    Abstract: Systems and methods are described that use software diversification techniques to improve the security of mobile applications. Embodiments of the disclosed systems and methods may, among other things, facilitate secure application distribution through deployment of diverse of applications in an application distribution channel. Software diversification consistent with certain disclosed embodiments may mitigate large-scale automated circumvention of security protections by presenting attacking malware moving and/or otherwise unpredictable diverse targets.
    Type: Application
    Filed: July 23, 2021
    Publication date: November 11, 2021
    Inventors: Stephen G. MITCHELL, Gilles BOCCON-GIBOD
  • Patent number: 11080042
    Abstract: Systems and methods are described that use software diversification techniques to improve the security of mobile applications. Embodiments of the disclosed systems and methods may, among other things, facilitate secure application distribution through deployment of diverse of applications in an application distribution channel. Software diversification consistent with certain disclosed embodiments may mitigate large-scale automated circumvention of security protections by presenting attacking malware moving and/or otherwise unpredictable diverse targets.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: August 3, 2021
    Assignee: Intertrust Technologies Corporation
    Inventors: Stephen G. Mitchell, Gilles Boccon-Gibod
  • Publication number: 20210067315
    Abstract: This disclosure relates to systems and methods for performing cryptographic operations in connection with the management of electronic content using multiple license services. In some circumstances, a content service may not wish to share unencrypted content keys with a single license service for a variety of security reasons. Embodiments of the disclosed systems and methods may use multi-party cryptographic methods in connection with the management of protected content keys and/or associated licenses and/or the distribution of content keys and/or licenses to authorized users and/or devices. In various embodiments, a content service may split a content key into a plurality of key shares and may transmit the key shares to a plurality of different license services. The license services may coordinate operations to generate a protected content key without revealing unencrypted content key to any of the participating license services.
    Type: Application
    Filed: August 27, 2020
    Publication date: March 4, 2021
    Applicant: Intertrust Technologies Corporation
    Inventors: Stephen G. Mitchell, Vanishree Rao
  • Publication number: 20210034736
    Abstract: The disclosure relates to systems and methods for managing state using relatively small assistance from protected hardware. Obfuscated code segments may communicate with supporting protected hardware, store encrypted state values in main memory, and/or communicate via secure channels to secure platform hardware components. In various embodiments, consistent state may be achieved, at least in part, by computing secure tag information and storing the secure tag information in a secure and/or otherwise protected device register. Consistent with embodiments disclosed herein, the tag information may be used to derive keys used to encrypt and/or decrypt stored state information. Tag information may further be used in connection with verification operations prior to using the information to derive associated keys.
    Type: Application
    Filed: July 29, 2020
    Publication date: February 4, 2021
    Applicant: Intertrust Technologies Corporation
    Inventor: Stephen G. Mitchell