Information source encrypted multimedia data export security protection method, device and equipment

The invention provides an information source encrypted multimedia data export safety protection method, device and equipment, and the method comprises the steps: carrying out the decryption of a multimedia data encryption key ciphertext through employing a multimedia data encryption key in a hardware safety medium under the condition of determining that an obtained multimedia data code stream is encrypted and signed, and obtaining a decrypted multimedia data encryption key ciphertext; decrypting the obtained multimedia data code stream by using the obtained first multimedia data encryption key, and performing signature verification on the decrypted multimedia data; under the condition that the decrypted multimedia data signature verification is passed, the multimedia data content carried in the packaging unit is used as an operation object, in a hardware security medium, a preset signature key is used for carrying out signature operation, and a second multimedia data encryption key is used for carrying out en