Broad-View of Cryptography

Basic Terminology

• Plain-Text -> The unencrypted or “original” message.
• Cipher-Text -> The encrypted message
• Cipher -> An algorithm for performing encryption and decryption.
• Key -> A piece of information that specifies the transformation of plain-text into cipher-text or vice-versa.

Type of Ciphers

• Symmetric -> Uses a shared key as part of an algprithm
• Asymmetric -> Uses a public and private key as part of the algorithm.
• Block Cipher
• Stream Cipher