Colour Image Watermarking based on Wavelet and QR Decomposition

Abstract

Water marking is becoming an indispensible tool for modern copy right protection & secure communications of hidden data. Embedding water marking in Image / video or digital data is norm of the day, to prove ownership & copy right protection. However there are a number of security threats to water marking, such as unauthorized extraction, removal, tampering of cover media etc. The system proposed is a highly secure video water marking system which is secured by using combination of Biometrics, Stegnography & cryptography. The watermark is encrypted using mixed key cryptography. The private key used for encryption is generated by fingerprint of authorized person. Another unique feature of the proposed system is that private key may not be pre-shared or sent on
a transmission channel, as it can be regenerated at the receiver side using biometric authentication.