Cryptography (cryptography) comes from the Greek language, consisting of two syllables namely crypto and graphia. Crypto means hiding, while graphia means writing. In history, cryptography is quite famous during the heyday of the Greeks around 400 BC. The tool used to create hidden messages during the Greek civilization was called scytale. Data security is the most important thing to always keep confidential. Because information that is open or leaked without clear control can be used by certain parties with harmful purposes.
- Plaintext, i.e. message readable "Plaintext [p]" (pre-message or pre-encrypted information)
- Ciphertext, i.e. unreadable random messages "Ciphertext [c]" (messages that have been encrypted, cannot be read because the characters have no meaning).
- Algorithm, which is a method for encrypting and decrypting "Encrypt [E[p]]" (cryptographic process from p to c).
- Key, which is the key to perform cryptographic techniques.
Example of an encrypted message.
Random data message:
Random data message:
With keys 10
Example message description.
original data message:
original data message:
Decryption is the reverse process of encryption where this process will change the ciphertext into plaintext using the same 'inverting' algorithm and key.
Description of the result: Open letter
