Haw to transmit secrets

  E n c r y p y i o n  

CPT 105 · Franklin College · Erich Prisner · 2002-2007

Encryption has a long and interesting history.

Nowadays, the standard is public key encryption. No keys have to be exchanged. Everbody creates a secret key and a public key. The public key is published. Messages to person A can be encoded with the public key of person A, but they can only be decoded using A's secret key. So everybode can encode messages to A, but only A can read them. Examples of public key encryption methods are the RSA algorithm (Rivest, Shamir, Adleman), or the PGP program ("Pretty Good Privacy") based on RSA.