Anti-counterfeiting and encryption method based on local random image transformation technique

An anti-counterfeiting and encryption method based on a local random image transformation technique, wherein both a sender and a receiver of encrypted information have a same first random scatter plot;

• the anti-counterfeiting and encryption method comprises the following steps:
• S1, forming, by the sender, a corresponding local coverage area on the first random scatter plot with a pattern of information to be encrypted, and carrying out pixel value transformation on all pixels or some randomly dispersed pixels in the local coverage area on the first random scatter plot to obtain a second random scatter plot;
• S2, after receiving a unique identification code of the first random scatter plot and the second random scatter plot, calling, by the receiver, the first random scatter plot stored by the receiver according to the unique identification code, comparing the first random scatter plot with the received second random scatter plot point by point, and subjecting the pixels in the second random scatter plot whose pixel values are inconsistent with those in the first random scatter plot to display processing to obtain displayed encrypted information.