An Overview to the Proposed Technique for Image Authentication Using LDPC Codes
Imran Khan, Bhanu Pratap Singh Sengar · 2013
Image authentication is important in content delivery via untrusted intermediaries, such as peer-to-peer (P2P) file sharing. Many differently encoded versions of the original image might exist. In addition, intermediaries might tamper with the contents. Distinguishing legitimate diversity from malicious manipulations is the challenge addressed in this dissertation. We proposed an approach using encryption and LDPC source coding for the image authentication problem. The key idea is to provide a Slepian-Wolf encoded quantized image projection as authentication data which is again encrypted using a secret key cryptography before ready to send. This can be correctly decoded with the help of an authentic image as side information.