The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 14, 2001
Filed:
Aug. 28, 1997
Barry Bond, Renton, WA (US);
Sudeep Bharati, Bellevue, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Untrusted executable code programs (applets or controls) are written in native, directly executable code. The executable code is loaded into a pre-allocated memory range (sandbox) from which references to outside memory are severely restricted by checks (sniff code) added to the executable code. Conventional application-program interface (API) calls in the untrusted code are replaced with translation-code modules (thunks) that allow the executable code to access the host operating system, while preventing breaches of the host system's security. Static links in the code are replaced by calls to thunk modules. When an API call is made during execution, control transfers to the thunk, which determines whether the API call is one which should be allowed to execute on the operating system.