This is a z transform based watermarking algorithm used for copy right protection

In this paper we proposed a method of embedding owner’s speech signal. Speech being a biometric data, the watermark signal in this method is expected to be more meaningful and has closer correlation with copyright holder. The main issue of co

在excel工作表保护表格，随机插入行，随行复制上行的公式。-Excel worksheet protection in the form, insert a random line, accompanied by copy of the formula up.

image encryption for protection nd copy right