This paper brings forward a frangibility blind digital watermark algorithm based on mark strong watermark.It selects three luminance DCT coefficients at random,then embeds watermark information.

• 从基于标识性鲁棒水印出发,提出了一种脆弱性防篡改盲数字水印算法,即任意选择3个亮度DCT系数嵌入水印信息。