2. What is CRYPTOGRAPHY ?
• Cryptography is an art of protecting
information by transforming it
(encrypting it) in to an unreadable format
called cipher text. Only those who possess a
secret key can decipher (for decrypt) the
massage into plaintext.
8. Disadvantages
• Public keys should/must be authenticated:
• Slow:
• Uses up more computer resources:
• Widespread security compromise is
possible:
• Loss of private key may be irreparable: