35 results about "Fuzzy extractor" patented technology

The invention discloses a lightweight security authentication method based on an XOR gate arbiter unclonable function XOR-APUF. The scene of the method comprises a server side and a token side. According to the method, a reverse fuzzy extractor is constructed at a token end and used for error correction of an XOR-APUF response, a Von Noemann encoder is constructed to encode the XOR-APUF response,the encoded response is separated from original excitation by a direct mapping relation, and the intrinsic noise of an excitation response pair is improved while effective authentication is ensured. Compared with an existing authentication method based on a physical unclonable function PUFs, the machine learning attack resistance of the protocol is improved while the consumption of token hardwareresources is reduced.

The invention discloses a random number generation, regeneration and tracking method based on a non-uniform random source in a group, and an electronic device. The group is composed of a trusted administrator and a plurality of generators, and the administrator maintains the group to authenticate and track the identities of the generators; fingerprints are taken as an example, each generator in the group can independently operate a fuzzy extractor, and obtains the same almost uniform random character string by utilizing the fingerprints of the generators; any generator can generate an almost uniform random character string for the group by using the fingerprint of the generator, and other generators can recover the character string through the fingerprints of themselves; and the same random source can be repeatedly used, and a plurality of random character strings are obtained. For any two legal generators, the recovered random strings are the same; the opponent cannot distinguish the generator of the extracted random string, cannot forge the group random string extracted by each generator, and cannot distinguish the extracted string and the real random string in the probability polynomial time; and an administrator may track each generator.