An application method of a power analysis attack defense technique for an AES encryption algorithm using a scrambler applies a defense technique to an AES encryption algorithm to provide security against power analysis attack, has the characteristic of using the existing encryption environment since there is no difference in operation results, does not degrade the encryption algorithm, and provides security against power analysis attack. The application method of a power analysis attack defense technique for an AES encryption algorithm using a scrambler applies defense technique to an AES-128 algorithm, which is vulnerable to power analysis attack, to provide security against power analysis attack, has the characteristic of using the existing encryption environment since there is no difference in operation results, does not degrade the encryption algorithm, and provides security against power analysis attack.
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