Using security-related attributes

US7926105B2 · kind B2 · utility

Assignee

• Microsoft Corporation · US

Inventors

• Karen Elizabeth Corby · Seattle, US
• Mark Alcazar · Seattle, US
• Viresh Ramdatmisier · Seattle, US
• Ariel Jorge Kirsman · Bellevue, US
• Andre A. Needham · Redmond, US
• Akhilesh Kaza · Sammamish, US
• Raja Krishnaswamy · Redmond, US
• Jeff Cooperstein · Bellevue, US
• Charles W. Kaufman · Northborough, US
• Chris Anderson · Moissy-Cramayel, FR
• Venkata Rama Prasad Tammana · Kirkland, US
• Aaron Goldfeder · Seattle, US
• John M. Hawkins · Duvall, US

Key dates

• Filing date: Feb 28, 2006
• Grant date: Apr 12, 2011
• Expiry date: Oct 26, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F21/577
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

Described is a technology including an evaluation methodology by which a set of privileged code such as a platform's API method may be marked as being security critical and/or safe for being called by untrusted code. The set of code is evaluated to determine whether the code is security critical code, and if so, it is identified as security critical. Such code is further evaluated to determine whether the code is safe with respect to being called by untrusted code, and if so, is marked as safe. To determine whether the code is safe, a determination is made as to whether the first set of code leaks criticality, including by evaluating one or more code paths corresponding to one or more callers of the first set of code, and by evaluating one or more code paths corresponding to one or more callees of the first set of code.