SCXI-1162HV | NI | Public key cryptography

Description

SCXI-1162HV | NI | Public key cryptography

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Public key cryptography is a trapdoor one-way function. We say that a function f is a one-way function, that is, if any x in its domain is easy to calculate y=f (x), but it is very difficult to calculate x when y in the range of f is known. The public key cryptography is designed based on this principle, using auxiliary information (trapdoor information) as the secret key. The security strength of such passwords depends on the computational complexity of the problem they are based on.

The basic idea of public key cryptography is that keys are divided into encryption key E, decryption key D, and public key M. SCXI-1162HV encryption key E and public key M can be made public, but D cannot be made public. When encrypting, the function f1 (E, M) with E and M as parameters is used for encryption, and when decrypting, the function f2 (D, M) with D and M as parameters is used for decryption.

In traditional cryptographic algorithms, once the encryption process is known, the decryption process can be inferred. In the algorithm of public key cryptography, even if the encryption process is known, it is impossible to deduce the decryption process in SCXI-1162HV. Therefore, calculating the encryption key E, public key M, and decryption key D requires special algorithms and steps. To ensure that the decryption key D cannot be derived from the encryption key E and the public key M.

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