Basic HTML version of Foils prepared July 6 99

Foil 19 Public Key Cryptography (1)

From Security Infrastructure fo Electronic Commerce and Internet CPS714 Computational Science Information Track -- June 2 and June 7 99. by Roman Markowski
Symmetric Cryptography
  • adding Confidentiality; single key, shared secret
  • Standards: DES (Digital Encryption Standard) and IDEA (International Data Encryption Algorithm)
  • fast, easy to implement, reliable
  • problem: key exchange in un-trusted networks
Secret key, Secure channel
Cleartext
message
Cleartext
message
Encrypt
Decrypt

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