PROGRAM OBFUSCATOR

申请公布号：

WO2007091558(A1)

申请号：

WO2007JP52026

申请日期：

2007.02.06

申请公布日期：

2007.08.16

申请人：

MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;SATO, TAICHI;ASAI, RIEKO;NICOLSON, KENNETH ALEXANDER

发明人：

SATO, TAICHI;ASAI, RIEKO;NICOLSON, KENNETH ALEXANDER

分类号：

G06F21/22

主分类号：

G06F21/22

摘要：

<p>A program obfuscator divides a tartest program into blocks, determines program instructions arranged in accordance with the input/output relation between the blocks, and places program instructions to compute the values of secret information in various positions dispersedly. Specifically, the value of the variable for secret information computation delivered from one block to the next is equalized to the one entered into the next block. A random variable conversion instruction is added to each block in such a way that the value when outputted from one block is within an expected range as the input into the next block.</p>