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CRYPTOGRAPHY - Coggle Diagram
CRYPTOGRAPHY
Greek words:
"kryptos"
=
hide
+
"graphe"
=
write
writing secret codes
Julius Caesar
Roman emperor who led Rome during times of war
CAESAR CIPHER
cryptography peaked during the
world war
Two Things
ENCRYPTION
WRITE THE SECRET MESSAGE
PLAINTEXT
(original message) to
CIPHERTEXT
(code)
DECRYPTION
DECODE THE SECRET MESSAGE
CIPHERTEXT
(code) to
PLAINTEXT
(original message)
TWO TYPES
SYMMETRIC CRYPTOGRAPHY
CAESAR CIPHER
plaintext: S T O P
ciphetext: U V Q R
one private key
not secure against man-in-the-middle attacks
ASYMMETRIC CRYPTOGRAPHY
one private key
and
one public key