Patent ID: 8661239

Claim:
An encryption device for controlling download and access operations performed to a mobile terminal, comprising: a switch circuit and an encryption chip, wherein, the switch circuit is disposed on a download channel between a master chip of the mobile terminal and a connector of the mobile terminal and is configured to control an on-off of the download channel, and the encryption chip is disposed on a mainboard of the mobile terminal and is configured to control an on-off of the switch circuit through states of the encryption chip; wherein the encryption chip has a protecting state and a non-protecting state; when the encryption chip is set to be in the protecting state, the control end of the encryption chip outputs a low electrical level, the switch circuit is open, and the download channel is disconnected; when the encryption chip is set to be in the non-protecting state, the control end of the encryption chip outputs a high electrical level, the switch circuit is closed, and the download channel is connected.