Cryptographic Terminology

Cryptography · Axiom Academy

LESSON Cryptographic Terminology Master the essential vocabulary that forms the foundation of cryptography Plaintext is the original, readable message that you want to protect. It's the information in its natural, unencrypted form that anyone can understand. Ciphertext is the scrambled, unreadable version of the plaintext after it has been transformed. It appears as gibberish to anyone who doesn't have the means to reverse the transformation. Encryption is the process of transforming plaintext into ciphertext. It's a mathematical operation that makes your message unreadable to unauthorized parties. Decryption is the reverse process - converting ciphertext back into plaintext. Only those with the proper credentials can perform this operation successfully. A key is the secret piece of information used to control both encryption and decryption. Think of it as the password or code that determines exactly how the transformation happens. Different keys produce different ciphertexts from the same plaintext. The security of most cryptographic systems depends on keeping the key secret, not the encryption algorithm itself. A cipher is the algorithm or method used for encryption and decryption. It's the specific set of rules and mathematical operations that transform plaintext to ciphertext and back. Examples include the Caesar cipher (shifting letters), AES (Advanced Encryption Standard), and RSA (a public-key cipher). Each cipher has unique properties and security characteristics.

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