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Cryptography: Securing the Information Age. SUBMITTED BY: SUBMITTED TO: ANAND MAHALAHA Miss. A.A. KUJUR 0601IT081006 (HOD I.T.). Agenda. Definitions
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Cryptography: Securing the Information Age SUBMITTED BY:SUBMITTED TO: ANAND MAHALAHA Miss. A.A. KUJUR 0601IT081006 (HOD I.T.)
Agenda • Definitions • Why cryptography is important? • Available technologies • Benefits & problems
Essential Terms • Cryptography Encryption Plain text Cipher text • Decryption Cipher text Plain text • Cryptanalysis • Cryptology Secret writing
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 Writing Secret writing Steganography Cryptography
Steganography • Steganography – covered writing – is an art of hiding information • Popular contemporary steganographic technologies hide information in images
Hiding information in pictures Image in which to hide another image Image to hide within the other image
Retrieving information from pictures Image with other hidden within Recreated image
Types of Secret Writing Secret writing Cryptography Steganography Substitution Transposition Code Cipher
Benefits of Cryptographic Technologies • Data hiding • Data integrity • Authentication of message originator • Electronic certification and digital signature
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? • 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…??? • Your questions are welcome!