Cryptography

Definitions:
Plaintext vs. Ciphertext
Cipher
Key
Required by the cipher for encrypting and decrypting

Cryptography and Encryption:
Shared key encryption:
Both sender and rcvr of an encrypted msg to have a shared secret – a sequence of characters called a key that the sender uses to encrypt the msg and that the recipient uses to decrypt it
Also known as secret key or symmetric key encryption

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