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:
Jan. 01, 2019
Filed:
Dec. 14, 2015
David Whelihan, Framingham, MA (US);
David Whelihan, Framingham, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
A method for limiting execution of an encrypted computer program on a secure processor includes executing a first set of instructions encoding a test for determining whether a value of a register of the secure processor belongs to a set of valid register values encoded in the encrypted computer program. Execution of the first set of instructions causes the secure processor to read a first register value from the register of the secure processor, the register of the secure processor preventing repeated reads of a same value of the register, and determine whether the first register value belongs to the set of valid register values encoded in the encrypted computer program. Execution of further instructions of the encrypted computer program is prevented if the first register value does not belong to the set of valid register values encoded in the encrypted computer program.