Abstract: A lattice-based proxy signature method, apparatus and device, a lattice-based proxy signature verification method, apparatus and device, and a storage medium. Polynomials are randomly selected in rings to calculate public and private keys of nodes, and the magnitudes of proxy public and private keys are the same as the magnitudes of public and private keys of an original signer. Therefore, compared with existing proxy signature schemes, the present application has smaller lengths of public and private keys and higher storage efficiency. Proxy signature information generated in the present application shows a signature of the original signer and also shows a signature of a proxy signer. Once a proxy signature is created, the proxy signature cannot be repudiated by the proxy signer, and has strong non-repudiation and strong unforgeability. The proxy signature method has the advantage of resisting quantum computer attack.

Abstract: The present invention relates to a process for preparing a thin film on a substrate in which a first precursor composition (FPC) and a second precursor composition (SPC) are combined, a thin layer of the combined first precursor composition (FPC) and second precursor composition (SPC) is formed on a substrate and the thin layer is cured, an article comprising said thin layer, a composition comprising said first precursor composition (FPC) and said second precursor composition (SPC), a kit-of-parts comprising said first precursor composition (FPC) and said second precursor composition (SPC) in two vessels and the use of said composition or kit-of-parts for preparing a thin film on a substrate and for preparing an optical or electrical coating.

Abstract: Techniques and apparatuses are described that implement a hearable with on-head detection using a single optical sensor. The hearable determines on-head detection based on a distance measured by the single optical sensor being less than a distance limit associated with on-head detection. A shape of the hearable's housing causes the hearable to have at least one orientation while at static equilibrium on a flat surface. This orientation causes the flat surface to be within the field-of-view of the optical sensor and causes a distance between the flat surface and the optical sensor to be greater than the distance limit associated with on-head detection. In this way, false positives associated with on-head detection can be mitigated without adding additional sensors (e.g., another infrared sensor, another proximity sensor, or a motion sensor) and without utilizing more complex optical sensors that determine additional information about the object, such as material composition.

Abstract: A trusted anonymous voting method includes: performing a hash operation on original voting content to obtain a hash output including a commitment value cvi; blinding the commitment value cvi based on information of other voters to obtain commitment value tuples {tilde over (c)} and {tilde over (x)}; signing the commitment value tuple {tilde over (c)} by using an ESDSA to obtain a signature tuple {tilde over (s)}; and establishing a vote tuple ({tilde over (c)}, {tilde over (s)}, {tilde over (d)}) based on the commitment value tuple {tilde over (c)}, the signature tuple {tilde over (s)} and a signature tuple {acute over (d)} of other voters, and uploading the vote tuple (?, ?, {acute over (d)}) and the commitment value tuple {tilde over (x)} to the blockchain, where signature tuple {tilde over (d)} is generated in a case that other voters verify the signature tuple {tilde over (s)} and the signature tuple {tilde over (s)} passes the verification, and the commitment value tuple {tilde over (x)} is used to decry

Abstract: A timestamp generation method and apparatus, and an electronic device and a storage medium, which are used for solving the technical problem of recorded information being easily leaked because a trusted third party is usually needed as a timestamp authority for recording in a traditional trusted timestamp generation method. In the present invention, the method comprises: acquiring a file record; calculating a hash value of the file record; sending the hash value to a random issuer, and receiving a signature result returned by the random issuer, wherein the signature result is generated after the random issuer signs the hash value and a receiving time, and the receiving time is the time when the random issuer receives the hash value; and storing the signature result in a blockchain as a timestamp of the file record.

Abstract: A filter and array of filters providing inductive coupling are disclosed. According to one aspect, an RF filter includes a plurality of dielectric layers with a first ground plane on one side of the dielectric layers and a second ground plane on an opposite side of the dielectric layers. One of the first and second ground planes provides an input port and one of the first and second ground planes provides an output port. Two parallel strip line resonators, lie in a first plane parallel to, and between, the first and second ground planes, the two parallel strip line resonators, having a gap there between. An inductive coupling plate in proximity to the gap, is grounded at an edge and lies in a second plane, the second plane parallel to the first plane and lying between the first plane and one of the first and second ground planes.

Abstract: A low-voltage user demand response interaction apparatus and an operation method therefor. The apparatus comprises an electrical loop, a mechanical switch, a protection module, a data collection module, a control processor, a power supply module, a communication module, a load identification module, a blockchain module and a demand response module, wherein the mechanical switch is connected to the electrical loop; the protection module is connected to the mechanical switch; the control processor is connected to the protection module; the load identification module, the blockchain module and the demand response module are respectively connected to the control processor; the data collection module is connected to the electrical loop, and transmits data to the control processor; and the communication module and the power supply module are respectively connected to the control processor.

Abstract: Embodiments of an Antenna and Filter Unit (AFU) for an Advanced Antenna System (AAS) are disclosed herein. In one embodiment, an AFU for an AAS comprises a first unit and a second unit. The first unit comprises a 1:N power splitter comprising an input coupled, directly or indirectly, to an antenna port of the AFU and N outputs, where N?2. The first unit also comprises N first board-to-board type connectors electrically connected to the N outputs of the 1:N power splitter, respectively. The second unit comprises N second board-to-board type connectors configured to be electrically coupled to the N first board-to-board type connectors, respectively, and N antenna elements coupled, directly or indirectly, to the N second board-to-board connectors, respectively. By positioning the 1:N power splitter prior to the N first and N second board-to-board type connectors, input power at each of the board-to-board type connectors is reduced, which thereby reduces Passive Intermodulation.

Abstract: Hybrid structures, filters and duplexers are disclosed. According to one aspect, a radio frequency (RF) duplexer includes a common resonator coupled to at least one chamber of an air cavity filter, a first ceramic waveguide filter. CWGF, having a first opening in a first CWG wall of the first CWGF, the first opening at least partially aligned with a first window of the common resonator to couple energy between the common resonator and the CWGF, and a second CWGF having a second opening in a second CWG wall of the second CWGF, the second opening at least partially aligned with the second window of the common resonator to couple energy between the air cavity resonator and the CWGF.