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:
Apr. 27, 2010
Filed:
Aug. 24, 2004
Bor-sung Liang, Kaohsiung, TW;
Bor-Sung Liang, Kaohsiung, TW;
Sunplus Technology Co., Ltd., Hsinchu, TW;
Abstract
A device of applying protection bit codes to encrypt a program for protection is disclosed. The program has a plurality of instructions P (positive integer). The device includes a protection-bit-code generator, a first protection-bit-code location generator and a protection-bit-code insertion unit. The protection-bit-code generator generates a plurality of protection bit codes in accordance with the plurality of instructions of the program, wherein each instruction has a plurality of bits I (positive integer). The first protection-bit-code location generator generates a plurality of insertion positions N (positive integer) for each protection bit code in accordance with processor status when executing the program. The protection-bit-code insertion unit inserts each protection bit code in a position between (N−1)th- and Nth-bit of a respective instruction of the program in accordance with the insertion position N generated by the first protection-bit-code location generator, thereby generating an encrypted program.