Abstract: A blockchain-enhanced open Internet of Things (IoT) access architecture includes an access point, a number of IoT devices, a hash access mechanism, a blockchain mining network, and a blockchain enabling mechanism that manages network access of the IoT device. The blockchain-enhanced open IoT access architecture provided in the present invention provides a secure, reliable, fair, and short-packet access service for a plurality of devices in an IoT network by using features of a blockchain such as distributed storage, tamper-proofing, and traceability, thereby promoting the trust and cooperation between the devices and ensuring the security and efficiency of the network in the large-scale untrustworthy IoT network. The blockchain-enhanced open IoT access architecture in the present invention can provide secure and reliable IoT access with low latency and a high value in practice.

Abstract: Anti-peep display assembly and display device are provided. The anti-peep display assembly includes a backlight module, a first birefringence control type liquid crystal cell, a second birefringence control type liquid crystal cell, and a display liquid crystal cell. Along a thickness direction of the anti-peep display assembly, the first birefringence control type liquid crystal cell and the second birefringence control type liquid crystal cell are between the backlight module and the display liquid crystal cell, and the first birefringence control type liquid crystal cell is between the second birefringence control type liquid crystal cell and the backlight module. A first polarizer is arranged on a side of the display liquid crystal cell away from the second birefringence control type liquid crystal cell, and a second polarizer is arranged between the display liquid crystal cell and the second birefringence control type liquid crystal cell.

Abstract: The present invention discloses a satellite-based blockchain architecture, including a terrestrial blockchain miner network, a constellation system, and a consensus protocol coordinating the constellation system and the terrestrial blockchain miner network. In each round, a satellite generates an oracle, and satellites broadcast the oracle to the terrestrial blockchain miner network. The oracle selects a terrestrial miner as a winner of the current round based on a specific rule. The winning terrestrial miner has the right to generate a new block in the round, and broadcasts the new block to other miners by using the terrestrial blockchain miner network. Other miners receiving the new block check the validity of the block, and if the check succeeds, the block is broadcast to other miners by using the terrestrial blockchain miner network.

Abstract: A blockchain-enhanced open Internet of Things (IoT) access architecture includes an access point, a number of IoT devices, a hash access mechanism, a blockchain mining network, and a blockchain enabling mechanism that manages network access of the IoT device. The blockchain-enhanced open IoT access architecture provided in the present invention provides a secure, reliable, fair, and short-packet access service for a plurality of devices in an IoT network by using features of a blockchain such as distributed storage, tamper-proofing, and traceability, thereby promoting the trust and cooperation between the devices and ensuring the security and efficiency of the network in the large-scale untrustworthy IoT network. The blockchain-enhanced open IoT access architecture in the present invention can provide secure and reliable IoT access with low latency and a high value in practice.