METHOD AND APPARATUS FOR FAST IMAGE ENCRYPTION AND INVISIBLE DIGITAL WATERMARK

摘要

The invention is for a method and system for encrypting and decrypting image/signal, based on new column and/or row operation of the image/signal, and a new digital watermark system, based on the new encryption/decryption system. The column and row operation are introduced for creating a chaotic image/signal so that the resulting image/signal is unreadable/inaudible with a fast computational speed. The new digital watermark technology can sustain cropping damage for verification.