History
How long has Cryptography existed
thousands of years
What is plaintext
The original word/letters
How do you make a cipher
Have a key and plain text
One negative about OTP
Cannot give to someone faraway/ Need the same key
Name one substitution encryption.
Cesar, Vignere, One-time pad, Enigma machine Cipher.
What is Cryptography
Study of encrypting and decrypting messages.
How do you make a unbreakable code?
One time pad
One negative about Cesar Cipher
Easy to crack, Outdated
WWI: France, WWI: Britain
What is a cipher
They key to unscramble the letters
How do you make Vigenère cipher
Using multiple alphabet have a password and a plain text. Match the words to the password on the alphabet
One Negative about Transposition
Easy to solve using technology,
Who broke the Enigma machine code
Allen Turing
What is Vigenère Cipher
Encryption method using multiple alphabet
What was the key step to break Scytale cipher
Wrapping the ribbon on the same diameter(pillar) as the original.
Negative about Enigma machine
No letter could be encoded as itself
Cipher this code: Yajlcrln, can vjbcna xo juju cqrwqb. Hint: Cesar Cipher +9 shift.
Practice, the master of all things.
Using frequency of letters in a cipher text to decode message.
How do you make your own cipher
Have a plain text, a key, and alphabet.
Negative about Cipher
Every Cipher is breakable, unless you have a OTP