Abstract: The present disclosure provides techniques for redrawing a new diagram authentication code. An existing diagram authentication code and a rendering style configuration file are retrieved, and a plurality of original contexts are generated based on configuration information from the rendering style configuration file. The plurality of original contexts are analyzed with a predefined checking rule defining at least one prohibited combination of at least two of the plurality of original contexts, and at least one required context is generated based on analyzing the plurality original contexts with the predefined checking rule. A new diagram authentication code is then redrawn based on the generation of the at least one required context.

Abstract: The present disclosure provides techniques for generating an authentication code. These techniques may modularize processing diagram, noise element and words content as several modules. Then, a context message is added in individual modules by a computing device. The computing device may generate a plurality of contexts based on a configuration rendering style. Individual contexts correspond to one kind of diagram style allocation of authentication code. The computing device may define an executing sequence of the context based on a predetermined algorithm rule, and execute the drawing of diagram authentication code of the context based on the executing sequence of the sharp context.

Abstract: The present disclosure provides techniques for generating an authentication code. These techniques may modularize processing diagram, noise element and words content as several modules. Then, a context message is added in individual modules by a computing device. The computing device may generate a plurality of contexts based on a configuration rendering style. Individual contexts correspond to one kind of diagram style allocation of authentication code. The computing device may define an executing sequence of the context based on a predetermined algorithm rule, and execute the drawing of diagram authentication code of the context based on the executing sequence of the sharp context.

Abstract: When a user visits a webpage, the web browser obtains information of the user's operation behavior on the webpage and sends the obtained information of the operation behavior to the web server. The web server determines a weighted value of machine behavior based on obtained information of the user's operation behavior on the webpage. When the web server determines that the weighted value of machine behavior is not less than a defined threshold, it determines that user's operation behavior on the webpage is machine behavior.