Encryption

Encryption

1. Why Encryption?

   • Transmitting over a network is a threat to security
     • Reliable,fast and robust system
       • Transmit
       • Storing
   • Ehitcal issues in information systems
   • Frequent flow of digital images across the world over transmission media
     • Military Image DB
     • Confidential Video Conferencing
     • Medical Images
     • Online pesonal phtographs

2. Encryption Algorithms

   • Many algorithms during the last decade
   • Chaos based
     • Good For Practical Use(1)
       • Good Combination of Speed
       • High Security
       • Complexity
       • Reasonable computational overheads + computational power
     • New design in cryptography(1)
     • New trend
     • Evolution(1)
   • Traditional Ciphers(1)
     • IDEA,AES,DES,RSA
     • Not Suitable(1)
       • Need large compuatational power
       • High computing power

3. Characteristics of Digital Images(1)

   • Redundancy of data
   • Strong correlation among adjacent pixels
   • Being less sensitive