Ratan, Ram, DRDO-Scientific Analysis Group, Delhi - 110 054, India

• Defence Science Journal Vol 71 No 2 - Computers & Systems Studies
  Security Analysis of Bit plane Level Image Encryption Schemes
  Abstract  PDF
• Defence Science Journal Vol 70 No 4 - Computers & Systems Studies
  Cryptanalysis of an Image Cipher using Multi entropy Measures and the Countermeasures
  Abstract  PDF