3 results about "Dual code" patented technology

The present application belongs to the technical field of information security and coding theory, and provides a minimal linear code construction method, a secret sharing method and a secret sharing system, comprising: first defining a trace function in a finite field, constructing a two-to-one mapping, a vector Boolean function with a finite discrete value of Walsh spectrum, and then defining a code word set based on the function, embedding the output of the trace function into a linear code generation expression to generate a minimal linear code with a weight set and a support without strict inclusion; then using the dual code to establish a one-to-one correspondence between the participants and the dual code coordinates, the minimal code word support and the minimum access structure, embed the secret generation share distribution, and the participants meeting the conditions restore the secret through linear combination. The system contains four functional modules, which are suitable for distributed storage, blockchain key management and other scenes, and realize safe, efficient and expandable secret sharing. The present application can improve the security, efficiency and flexibility of secret sharing, and is suitable for multiple scenes and easy to expand.

This invention relates to the field of battery safety monitoring technology, specifically to a method and system for tracing batteries after combustion based on heterogeneous dual codes, solving the technical problem that existing technologies struggle with identification and tracing under abnormal conditions. The method includes: acquiring a microscopic depth image of the battery tab surface, performing image depth analysis based on the microscopic depth image to determine the character sequence corresponding to the plaintext character distribution area on the battery tab surface and the set of etching point coordinates corresponding to the QR code distribution area; performing database traversal matching based on the character sequence to obtain at least one candidate factory identification code and a QR code bitmap corresponding to each candidate factory identification code; and performing structural comparison analysis based on the etching point coordinate set and the QR code bitmaps corresponding to each candidate factory identification code to trace back to the target factory identification code from the at least one candidate factory identification code.

A dual-code lock comprises a lock housing (15), an actuating element (11, 11') for adjusting a lock bolt, at least one code wheel (3) rotatably mounted in the lock housing (15) about a pivot axis (A), a first and second setting bushing (4, 5) arranged coaxially to the code wheel (3) on opposite end faces, each with a coding notch (43, 53) in a cylindrical surface of the setting bushing (4, 5), two rockers (6, 7) partially encompassing the at least one code wheel (3), each with a pivot axis (62, 72) pivotally attached to the lock housing (15), a locking axis (61, 71) extending parallel to the pivot axis (62, 72), and a crossbar (63, 73) resting on the cylindrical surface of the setting bushings (4, 5), wherein the rockers (6, 7) are positioned between a Actuating element (11, 11') releasing position when the first or second code wheel (3) is entered with at least one code wheel.second locking secret and a locking position that locks the actuating element (11, 11') is pivotable, wherein all actuating bushings (5) are detachably and rotationally fixed mounted on the respective code wheel (3).