Abstract: Disclosed is a system and a method for information distribution. The system comprises: a server for generating a group key and its corresponding key deriving parameter, wherein the server encrypts sensitive contents by using the group key to obtain encrypted information; and terminals configured to receive the encrypted information through an open channel, extract the group key, then decrypt the encrypted information by using the group key to obtain the original content. In the group forming process, each terminal encrypts its private identifier using the public key and submits the ciphertext to the server. In information distribution process, the server transmits the ciphertext of sensitive contents and the key deriving parameter to the terminals via open channel Because private information available only to respective group members is required for calculating the group key, this mechanism ensures that the sensitive content can be transmitted securely on the open channel.

Abstract: A trim assembly for a vehicle seat is provided with a first trim panel adapted to be pivotally connected to a lower region of a rear surface of a backrest that is pivotally adjustable relative to a seat cushion, to cover a gap between the backrest and the seat cushion in an upright position of the backrest. A second trim panel is connected to the first trim panel to cover the gap in a forward position of the backrest relative to the seat cushion.

Abstract: A trim assembly for a vehicle seat is provided with a first trim panel adapted to be pivotally connected to a lower region of a rear surface of a backrest that is pivotally adjustable relative to a seat cushion, to cover a gap between the backrest and the seat cushion in an upright position of the backrest. A second trim panel is connected to the first trim panel to cover the gap in a forward position of the backrest relative to the seat cushion.

Abstract: The present invention provides a magnetic pump with a sealing structure, and belongs to the field of mechanical equipment. The magnetic pump includes a bearing housing, a pump cover, an external magnet, an internal magnet, and an isolation sleeve, the bearing housing is connected to the external magnet by using a drive shaft, the external magnet is sleeved outside the isolation sleeve, the isolation sleeve is sleeved outside the internal magnet, an end, distal from the external magnet, of the internal magnet is connected to a pump shaft, a support is disposed between the pump cover and the bearing housing, a sealing apparatus is disposed at a connection between the support and each of the pump cover and the bearing housing, and a magnetic sealing apparatus configured to prevent a medium in the support from leaking is disposed on the drive shaft. The magnetic pump has a plurality of sealing structures, which can completely prevent medium leakage when the isolation sleeve leaks.