The present application relates to the technical field of cooling of
data processing equipment, and particularly discloses a secure connection device of an SM4
encryption and decryption
algorithm network security device, which comprises a
password card main body, a main frame, a fixed heat dissipation part, an extended heat dissipation part, a supporting and locking part, an expandable heat conduction part and a positioning guide part, the main frame comprises a frame body, the lower side of the frame body is fixedly connected with a resisting frame, the right side of the inside of the frame body is fixedly connected with a resisting strip, the inside of the frame body is fixedly connected with the
password card main body, and the
password card main body is located between the resisting strip and the resisting frame, in the present application, the expandable heat conduction part, the extended heat dissipation part, the fixed heat dissipation part and the main frame are arranged, so that the secure connection device can protect the golden finger from being damaged when not being installed and used, can be unfolded in the shell of the
network security device when being installed and used, can increase the heat dissipation area, improve the
air cooling efficiency and be low in cost, can ensure the close and stable connection between the golden finger and the interface end, and can guarantee the reliability of
data transmission.