Image-based license encryption method and device

The invention discloses an image-based license encryption method. The method includes acquiring encryption information of a Java system; encrypting the encryption information by a preset algorithm to obtain a license ciphertext; combining the license ciphertext and a target image to acquire an encrypted image; deploying and replacing the encrypted image to a server. The method according to the embodiment has the advantages that the license ciphertext is acquired by encrypting the encryption information of the Java system, secondary encryption is performed by combining the license ciphertext and the image, a Java-developed software system is protected effectively through a license mechanism, functions of a license are given to play, and security is improved. The embodiment further discloses an image-based license encryption device.