Patents by Inventor Michael Brownlie

Michael Brownlie 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: 7174563
    Abstract: A computer network security system and method utilizes digitally signed and centrally assigned policy data, such as password length rules, that is unilaterally enforced at network nodes by node policy enforcement engines. The policy data may be variable on a per client or network node basis through a centralized authority, such as a certification authority. The computer network security system provides variable security policy rule data for distribution to at least one network node through a central security policy rule data distribution source, such as the certification authority. The central security policy rule data distribution source associates a digital signature to the variable security policy rule data to ensure the integrity of the policies in the system. Each network node uses a policy rule data engine and policy rule table to decode policy rule data and enforce the policy rules as selectively determined through the central authority.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: February 6, 2007
    Assignee: Entrust, Limited
    Inventors: Michael Brownlie, Stephen Hillier, Paul C. Van Oorschot
  • Patent number: 6202157
    Abstract: A computer network security system and method utilizes digitally signed and centrally assigned policy data, such as password length rules, that is unilaterally enforced at network nodes by node policy enforcement engines. The policy data may be variable on a per client or network node basis through a centralized authority, such as a certification authority. The computer network security system provides variable security policy rule data for distribution to at least one network node through a central security policy rule data distribution source, such as the certification authority. The central security policy rule data distribution source associates a digital signature to the variable security policy rule data to ensure the integrity of the policies in the system. Each network node uses a policy rule data engine and policy rule table to decode policy rule data and enforce the policy rules as selectively determined through the central authority.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: March 13, 2001
    Assignee: Entrust Technologies Limited
    Inventors: Michael Brownlie, Stephen Hillier, Paul C. Van Oorschot