Data encryption transmission method, system and equipment based on canvas and medium

The invention discloses a canvas-based data encryption transmission method, a canvas-based data encryption transmission system, canvas-based data encryption transmission equipment and a canvas-based medium, relates to the technical field of Web security, and solves the problem that an existing encryption means is weak in association relationship between image data and plaintext data. Deploying the encryption program to a preset site through a Web service; when it is detected that the web end needs to transmit image data and plaintext data, loading the encryption program deployed under a preset site; and encoding the image data and the plaintext data according to the encryption program, encrypting the encoding result of the image data and the plaintext data based on ascll encoding out-of-order encryption, storing the encryption result as a character string, uploading the character string to an OSS server, and obtaining a URL link containing the encryption result. The method not only encrypts the image and the