A secure transmission method for media content

This invention discloses a media content safe transmission method including: A mobile terminal generates a cryptographic key pair, a public key is transmitted to a media content server for storage and private key in the local terminal. When the mobile terminal sends a request of selecting service to the server, following steps are carried out: A, the server receives the selection request of the mobile key and cipher the media content data, B, The server finds out the public key corresponding to said mobile terminal to cipher said data, C, The server sends the ciphered data and data cryptographic terminal deciphers the key and uses it to decipher the data.