Picture-based password hiding and querying method

The invention discloses a picture-based password hiding and querying method. The method comprises the following steps: step 1, reading in a picture; and reading a picture for storing the password; step 2, preprocessing the picture; checking picture flag information; if the password is a first hidden password, initializing the picture; embedding initialization mark information into the picture; step 3, password hiding , converting an ASCII code of each character in the account and the password into a binary system in sequence, and adjusting the final value of the blue component of the image pixel according to the bit of the binary system so as to hide the account and the password in the picture. According to the invention, the password is hidden in a common picture, and the password is analyzed when needed, so that the password hiding and querying method based on the image is realized. C common image processing software cannot discover the passwords, so that the safety of the personal password of the user is i