| 摘要 |
According to one aspect of the present invention, a public-key encryption method which can assure security even though a quantum computer appears, which can be securely realized by an existing computer, and which may be realized in a low-electric-power environment can be constituted. More specifically, one spect of the present invention uses an integer solution of a diophantine equation as a private key. In this manner, an encryption apparatus, a decryption apparatus, or a key generation apparatus of a public-key encryption method using a problem that calculates an integer solution of a diophantine equation having no general solution algorithm as the basis of security is realized. Therefore the above problem can be solved.
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