Abstract: An electronic system and a security authority delegation method thereof are provided. The electronic system includes a first host device, a second host device, a first security device, and a second security device. The first security device is connected to the first host device. The second security device is connected to the second host device and the first security device. The first security device performs an attestation process on the second security device. If the second security device passes the attestation process, the first security device enables the second security device to verify executable images of the second host device. If the second security device does not pass the attestation process, the first security device disables a function of the second security device, and the function includes verifying the executable image of the second host device.

Abstract: A System on a Chip (SoC), a test device for testing the SoC, and a test method for testing the SoC are provided. The SoC includes a function register, a one-time programmable (OTP) memory, and a processor. The function register includes functional bits. The SoC performs a test operation based on data of at least one of the functional bits. The OTP memory includes setting bits and operating bits. When a bit value of a first setting bit among the setting bits is a first value, the SoC writes data coming from a first operating bit among the operating bits to a first functional bit among the functional bits. When the bit value of the first setting bit is the second value, the SoC writes a first bit value of the test data to the first functional bit.

Abstract: An event reporting method, a security management circuit, and a management system are provided. The management system includes first, second, and third security management circuits. The first security management circuit and the second security management are respectively located at a first layer and a second layer of a hierarchy structure. The third security management circuit is located at another layer of the hierarchy structure different from the first layer and the second layer. The first, second, and third security management circuits are respectively configured to determine an event occurring on a host connected to these security management circuits. A dedicated line is communicatively connected between the first and third security management circuits. According to a type of the event determined by the third security management circuit, the third security management circuit reports the event through the dedicated line. Accordingly, a reporting efficiency and system security are improved.

Abstract: A baseboard management controller (BMC) and an operation method thereof are provided. The BMC includes a path switching circuit, a host interface circuit, a universal serial bus (USB) hub controller, a USB physical layer circuit, and a control circuit. The host interface circuit is adapted to be electrically connected to a host circuit outside the BMC. The USB physical layer circuit is adapted to be electrically connected to an external USB host or an external USB device outside the BMC. The control circuit controls the path switching circuit to selectively couple the host interface circuit to the USB hub controller, selectively couple the USB hub controller to the USB physical layer circuit, or selectively couple the host interface circuit to the USB physical layer circuit.

Abstract: An event reporting method, a security management circuit, and a management system are provided. The management system includes first, second, and third security management circuits. The first security management circuit and the second security management are respectively located at a first layer and a second layer of a hierarchy structure. The third security management circuit is located at another layer of the hierarchy structure different from the first layer and the second layer. The first, second, and third security management circuits are respectively configured to determine an event occurring on a host connected to these security management circuits. A dedicated line is communicatively connected between the first and third security management circuits. According to a type of the event determined by the third security management circuit, the third security management circuit reports the event through the dedicated line. Accordingly, a reporting efficiency and system security are improved.

Abstract: An electronic system and a security authority delegation method thereof are provided. The electronic system includes a first host device, a second host device, a first security device, and a second security device. The first security device is connected to the first host device. The second security device is connected to the second host device and the first security device. The first security device performs an attestation process on the second security device. If the second security device passes the attestation process, the first security device enables the second security device to verify executable images of the second host device. If the second security device does not pass the attestation process, the first security device disables a function of the second security device, and the function includes verifying the executable image of the second host device.

Abstract: A baseboard management controller (BMC) and an operation method thereof are provided. The BMC includes a path switching circuit, a host interface circuit, a universal serial bus (USB) hub controller, a USB physical layer circuit, and a control circuit. The host interface circuit is adapted to be electrically connected to a host circuit outside the BMC. The USB physical layer circuit is adapted to be electrically connected to an external USB host or an external USB device outside the BMC. The control circuit controls the path switching circuit to selectively couple the host interface circuit to the USB hub controller, selectively couple the USB hub controller to the USB physical layer circuit, or selectively couple the host interface circuit to the USB physical layer circuit.

Abstract: An electronic system and a security authority delegation method thereof are provided. The electronic system includes a first host device, a second host device, a first security device, and a second security device. The first security device is connected to the first host device. The second security device is connected to the second host device and the first security device. The first security device performs an attestation process on the second security device. If the second security device passes the attestation process, the first security device enables the second security device to verify executable images of the second host device. If the second security device does not pass the attestation process, the first security device disables a function of the second security device, and the function includes verifying the executable image of the second host device.

Abstract: A baseboard management controller (BMC) and an operation method thereof are provided. The BMC includes a path switching circuit, a host interface circuit, a universal serial bus (USB) hub controller, a USB physical layer circuit, and a control circuit. The host interface circuit is adapted to be electrically connected to a host circuit outside the BMC. The USB physical layer circuit is adapted to be electrically connected to an external USB host or an external USB device outside the BMC. The control circuit controls the path switching circuit to selectively couple the host interface circuit to the USB hub controller, selectively couple the USB hub controller to the USB physical layer circuit, or selectively couple the host interface circuit to the USB physical layer circuit.

Abstract: A fan louver comprises detachable outlet and inlet grills. The outlet grill comprises detachable first sectors each comprising holed first projections along one radius and first latched members along the other radius, the first latched members of one first sector being secured to the first projections of an adjacent first sector and the first projections thereof being secured to the first latched members of another adjacent first sector. The inlet grill comprises detachable second sectors each comprising holed second projections along one radius and second latched members along the other radius, the second latched members of one second sector being secured to the second projections of an adjacent second sector and the second projections thereof being secured to the second latched members of another adjacent second sector.

Abstract: An electric fan comprises a rotary hub comprising a hollow two-layer cylinder including a plurality of units each including: a gap between the layers, an axial first coupling edge abutted on an adjacent unit, an arcuate second coupling edge at its inner end joined with the first coupling edge, two internal ridges, and a rib interconnected the cylinder and a central sleeve; and a plurality of detachable blades comprising a blade section and a base including a raised member, a connecting edge in a joining portion of the blade section and the raised member, two side shoulders, and a forward, downward projection. Each base is inserted into the gap with the shoulders engaged with the ridges, the connecting edge engaged with the second coupling edge, and one side of the raised member engaged with the first coupling edge respectively. Also, each projection is threadedly secured to each rib.

Abstract: A flow control device including a body having an annular flange formed in a middle portion, a pair of sealing rings engaged on the body, two apertures formed in the body and located between the sealing rings, a plug and a spring received between the annular flange and a coupler, and a sleeve threadedly engaged on the body and a gap formed between the sleeve and the body, fluid flowing from the coupler may flow through one aperture and the gap and the other aperture and may flow into the other end of the body, and the plug will be pushed against the spring when the fluid flows into the body from the other end of the body such that the fluid may flow through the bore of the body and may flow out of the coupler.