Encryption

• Encryption


  The encoding of data so that it cannot be easily read directly
• There are different ways to encrypt data, some are more easily decoded than others
• Cipher / Shift Method

  • Used by Julius Caesar and others to very simply encode messages
  • A shift of 0 would mean A = A
  • A shift of 1 would mean A = B
  • A shift of 2 would mean A = C
  • You can shift up to 25 times before returning to A = A
• Rot13


  • Each letter is represented by 13 letters beyond it
  • A=N
  • B=O
  • C=P
• Enigma and Rot 13 are example of symmetric encryption
• Symmetric encryption uses a single key to encrypt and decrypt data. Asymmetric encryption uses two keys, a public and private key, to encrypt and decrypt data.
• Asymmetric encryption is also known as Public Key Encryption (PKE).