SUBMITTED BY: SUBMITTED TO:ANAND MAHALAHA Miss. A.A. KUJUR 0601IT081006 (HOD I.T.)

SUBMITTED BY: SUBMITTED TO:ANAND MAHALAHA Miss. A.A. KUJUR 0601IT081006 (HOD I.T.)

CRYPTOGRAPHY: SECURING THE INFORMATION AGE

CRYPTOGRAPHY: SECURING THE INFORMATION AGE

AgendaAgenda

Definitions

Why cryptography is important?

Available technologies

Benefits & problems

Essential TermsEssential Terms

Cryptography EncryptionPlain text Cipher text

DecryptionCipher text Plain text

Cryptanalysis

Cryptology

Information Security for…Information Security for…

Defending against external/internal hackers

Defending against industrial espionage

Securing E-commerce

Securing bank accounts/electronic transfers

Securing intellectual property

Avoiding liability

Types of Secret WritingTypes of Secret Writing

Secret writing

Steganography Cryptography

SteganographySteganography

Steganography – covered writing – is an art of hiding information

Popular contemporary steganographic technologies hide information in images

Hiding information in pictures

Hiding information in pictures

Image in which to hide another image

Image to hide within the other image

Retrieving information from pictures

Retrieving information from pictures

Image with other hidden within

Recreated image

Types of Secret WritingTypes of Secret Writing

Secret writing

Steganography Cryptography

Substitution Transposition

Code

Cipher

Benefits of Cryptographic Technologies

Benefits of Cryptographic Technologies

Data hiding

Data integrity Authentication of

message originator

Electronic certification and digital signature

Potential Problems with Cryptographic Technologies?

Potential Problems with Cryptographic Technologies?

False sense of security if badly implemented

Government regulation of cryptographic technologies/export restrictions

Encryption prohibited in some countries

How Secure are Today’s Technologies?

How Secure are Today’s Technologies?

Encryption does not guarantee security!

Many ways to beat a crypto system NOT dependent on cryptanalysis, such as:– Viruses, worms, hackers, etc.– Unauthorized physical access to secret

data

Cryptography is only one element of comprehensive computer security

DOUBTS…???DOUBTS…???

Your questions are welcome!