INDEXED TABLE BASED CODE ENCRYPTING/DECRYPTING DEVICE AND METHOD THEREOF
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United States of America Patent
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N/A
Issued Date -
Jun 7, 2012
app pub date -
Jan 31, 2011
filing date -
Dec 3, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An indexed table based code encrypting device adapted to encrypt an executable file of a computer program includes: an index creator configured to classify codes of the executable file into code blocks using a call code and store the number of calls and start addresses of the code blocks; and a block encrypter configured to encrypt the code blocks with encryption keys. An encryption key of a code block (hereinafter, first type code block) called once is created by using a code block calling the first type code block and an encryption key of a code block (hereinafter, second type code block) called twice or more is created by using a random number. The encryption keys of the first and second type code blocks are stored in the executable file.
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