This paper presents a novel web application tamper proof
method based on text waterarking and image waterarking,
this method uses MD5 algorithm to generate webpage
watermark. Attacker maybe forged fake webpage which have
the same waterark with original webpage by making collision
of hash value [12]. Therefore, we make use of Logistic map for
encrypting waterark. The innovation of this paper is to take
ASCII code of letters as grey level for generating image, which
effectively increases the embedding capacity of watermark.
Then make use of Henon map for fid out location where could
be embedded waterark into. Finally we hiding the image into
webpage. The embedding algorithm has a good trnsparence in
this method