Method and system for data protection

Example discloses a data protection method of the present invention, comprising: a data receiver to proceed to decrypt the encrypted data, the receiver checks whether there is data from a data sender and a data sender generates in an active state digital license, if the recipient is allowed to use the desired data in the data decryption process at least one key. Embodiments of the present invention also discloses a data protection system. Examples of the present invention can be realized using the secure data sharing cloud office era.