With the rapid development of Inter

With the rapid development of Internet, web attacking,
as well as important pages tampering, again and again take place
every day, webpage security is paid more and more attention.
This paper presents a novel web application tamper proof
method based on text watermarking and image watermarking,
this method generate grayscale image with ASCII code, then
make use of dual chaotic map in Encryption and decryption
process as well as in process of embedding and detection of
watermark. The results of experiment show that the method has
relatively high reliability, and has application value to prevent
webpage from tampering