agenda definitions why cryptography is important? available technologies benefits & problems

SUBMITTED BY: SUBMITTED TO: ANAND MAHALAHA Miss. A.A. KUJUR 0601IT081006 (HOD I.T.) CRYPTOGRAPHY: SECURING THE INFORMATION AGE

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Page 1: Agenda Definitions Why cryptography is important? Available technologies Benefits & problems

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

CRYPTOGRAPHY: SECURING THE INFORMATION AGE

http://images.google.com/imgres?imgurl=www.aep.ie/images/gifs/encryption.gif&imgrefurl=http://www.aep.ie/product/technical.html&h=160&w=160&prev=/images?q=encryption&start=20&svnum=10&hl=en&lr=&ie=UTF-8&oe=UTF-8&sa=N

AgendaAgenda

Definitions

Why cryptography is important?

Available technologies

Benefits & problems

Essential TermsEssential Terms

Cryptography EncryptionPlain text Cipher text

DecryptionCipher text Plain text

Cryptanalysis

Cryptology

Page 4: Agenda Definitions Why cryptography is important? Available technologies Benefits & problems

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

Page 5: Agenda Definitions Why cryptography is important? Available technologies Benefits & problems

Types of Secret WritingTypes of Secret Writing

Secret writing

Steganography Cryptography

Page 6: Agenda Definitions Why cryptography is important? Available technologies Benefits & problems

SteganographySteganography

Steganography – covered writing – is an art of hiding information

Popular contemporary steganographic technologies hide information in images

Page 7: Agenda Definitions Why cryptography is important? Available technologies Benefits & problems

Hiding information in pictures

Image in which to hide another image

Image to hide within the other image

Page 8: Agenda Definitions Why cryptography is important? Available technologies Benefits & problems

Retrieving information from pictures

Image with other hidden within

Recreated image

Page 9: Agenda Definitions Why cryptography is important? Available technologies Benefits & problems

Types of Secret WritingTypes of Secret Writing

Secret writing

Steganography Cryptography

Substitution Transposition

Code

Cipher

Page 10: Agenda Definitions Why cryptography is important? Available technologies Benefits & problems

Benefits of Cryptographic Technologies

Data hiding

Data integrity Authentication of

message originator

Electronic certification and digital signature

Page 11: Agenda Definitions Why cryptography is important? Available technologies Benefits & problems

Potential Problems with Cryptographic Technologies?

False sense of security if badly implemented

Government regulation of cryptographic technologies/export restrictions

Encryption prohibited in some countries

Page 12: Agenda Definitions Why cryptography is important? Available technologies Benefits & problems

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

Page 13: Agenda Definitions Why cryptography is important? Available technologies Benefits & problems

DOUBTS…???DOUBTS…???

Your questions are welcome!

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agenda definitions why cryptography is important? available technologies benefits & problems

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todays technologies

information age

imageretrieving information

false sense of security

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externalinternal hackers

intellectual property