8. The method of claim 1 , wherein generating the personalized image recognition challenge further comprises: generating a watermark based on the user input; and watermarking images of the plurality of images based on the watermark, such that the watermark is human perceptible in the plurality of images.
8. The method of claim 1 , wherein generating the personalized image recognition challenge further comprises: generating a watermark based on the user input; and watermarking images of the plurality of images based on the watermark, such that the watermark is human perceptible in the plurality of images. 9. The method of claim 8 , wherein the watermark comprises the user input, a fake input and a timestamp.