Anti-crack codes implemented method, apparatus, and method of generating

Two anti-crack codes implemented method, comprising: a first server generated according to a preset rule, the foreground randomly generated characters; generation rule preset in accordance with a second, randomly generated background pattern is composed of repeating pattern elements; synthesizing a foreground and background character pattern, to generate interference discriminating eye image codes and the authentication code stored in the image verification code picture pool; and when monitoring the user to log in the requesting application server through the client of the server or client login when an exception occurs, from the pool of random CAPTCHA image verification sheets under the code image to the client, so the client will be sent by the server CAPTCHA page to be displayed on the validation. Further, the present invention also provides a kind of anti-crack means a verification code generating method and device implemented. The above-described anti-crack codes implemented method and apparatus can improve the anti-crack codes manual force.