Method, system and device for data information distribution

The invention discloses a method, a system and a device for data information distribution in order to improve a security level of data information and strengthen copyright protection. The method comprises the steps that a current level publishing subsystem acquires first authorization authentication information from an authentication server; at least one copyright element in a first copyright information file is encrypted according to an encryption public key in the first authorization authentication information; a copyright information ciphertext is generated, and sent to a next level publishing subsystem; the next level publishing subsystem decrypts the copyright information ciphertext according to a decryption private key in second authorization authentication information acquired from the authentication server; and a corresponding second copyright information file is obtained.