This is the powerpoint presentation on CRYPTOGRAPHY. With attractive design and interactive slides.

1. CRYPTOGRAPHY
BY ARYAN KUMAR
B.TECH CSE

2. CONTENTS
• SECURITY
• SECURITY THREATS
• SECURITY GOALS
• WHAT IS CRYPTOGRAPHY
• BASIC TERMS
• ENCRYPTION AND DECRYPTION
• CATEGORIES OF CRYPTOGRAPHY
• COMPARISION
• CONCLUSION

3. WHAT DOES SECURE MEANS ?

4. THREATS
PASSIVE
THREATS
ACTIVE
THREATS
RELEASE OF
MESSAGE
CONTENTS
TRAFFIC
ANALYSIS
MASQUERAD
E
REPLAY
MODIFICATIO
N OF
MESSAGE
CONTENT
DENIEL OF
SERVICE

5. SECURITY GOALS
INTEGRI
TY
NON-
REPUDATION
SECUR
E

6. CRYPTOGRAPHY
IT IS THE SCIENCE AND THE ART
OF TRANSFORMING MESSAGES
TO MAKE THEM SECURE AND
IMMUNE TO ATTACK.

7. BASIC TERMS
• PLAIN TEXT
• CIPHER TEXT
• ENCRYPTION
• DECRYPTION
• KEYS

8. ENCRYPTION AND DECRYPTION

9. CATEGORIES OF
CRYPTOGRAPHY

10. COMPARISION
SYMMETRIC KEY
CRYPTOGRAPHY
• The same algorithm with the same
key is used for the encryption and
decryption.
• The key must be kept secret.
• It may be impossible or at least
impractical to decipher a message if
no other information is available.
ASYMMETRIC KEY
CRYPTOGRAPHY
• One algorithm is used for
encryption and decryption with the
pair of keys one for encryption and
one for decryption.
• One of the two key must be kept
secret.
• It may be impossible or at least
impractical to decipher a message if
no other information is available.

11. APPLICATIONS
• Defense service
• E – commerce
• Business transactions
• Internet payment system
• User identification system
• Access control
• Data Security

12. CONCLUSION
•By using of CRYPTOGRAPHY technique a
fair unit of confidentiality ,authentication
,integrity access control and availability of
data is maintained.

13. THANK YOU