2. The term cryptography comes from
the Greek words ‘CRYPTOS’ which
means ‘hidden’ and ‘GRAPHO’
which means ‘information'.
It is a process of making and using codes to
secure transmission of information.

6. Trusted Third Party
MS secure Secure
Messag Information Messag MSG
G
e Channel e
(Secret Information) (Opponent) (Secret
Information)

9. The importance of cryptography is its
applications in many advanced technologies as
 ATM BANKING
 COMPUTER PASSWORDS
 ELECTRONIC COMMERCE
 Cryptography is a powerful tool to provide
sophisticated approach to security

10. The importance of cryptography is its
applications in many advanced technologies as
 ATM BANKING
 COMPUTER PASSWORDS
 ELECTRONIC COMMERCE
 Cryptography is a powerful tool to provide
sophisticated approach to security