Encryption apparatus, method for encryption, method for decryption and computer-readable recording medium
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United States of America Patent
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Jan 9, 2018
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app pub date -
Feb 24, 2015
filing date -
Apr 23, 2014
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Abstract
An encryption apparatus includes a setting generator configured to generate an increasing function parameter regarding a predetermined one-way increasing function and a secret key necessary for encryption, and an encryptor configured to generate a first order-preserving encryption area regarding a plaintext using the one-way increasing function where the increasing function parameter is applied, generate a second encryption area regarding the plain text using the secret key, and generate a ciphertext by concatenating the generated first encryption area and the generated second encryption area.
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