Data Cryptographic System

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A Data Cryptographic System that is a data transformation system that implements a data cryptographic algorithm to solve a data cryptographic task.



References

2021a

In cryptography, we start with the unencrypted data, referred to as plaintext. Plaintext is encrypted into ciphertext, which will in turn (usually) be decrypted back into usable plaintext. The encryption and decryption is based upon the type of cryptography scheme being employed and some form of key. For those who like formulas, this process is sometimes written as:

$C = E_k(P)$

$P = D_k(C)$

where $P$ = plaintext, $C$ = ciphertext, $E$ = the encryption method, $D$ = the decryption method, and $k$ = the key.

2021b

Figure 1: Three types of cryptography: secret key, public key, and hash function.