FIELD: data transfer technologies.
SUBSTANCE: device which should be transmission destination, is authenticated, and if device is not authorized, then encrypted data, read from memorizing device, are decoded to produce decoded data, which are then encrypted again on basis of data of specific device key, received from device, which should be transmission destination for receiving re-encrypted data. Re-encrypted data are then transferred to device, which should be transmission destination.
EFFECT: forbidden unauthorized copying of data.
8 cl, 13 dwg
