Abstract: A method and system for adaptive authentication and key agreement in cloud-edge-device environments are provided. The method includes: utilizing a trust authority to perform identity registration for users, devices, edge servers, and cloud servers; after identity registration is completed, a user logs into a device and sends the user's request information to edge servers within range through the logged-in device; upon receiving the request information, the edge server provides service to the user: determining whether the edge server's service capability satisfies the request information; if yes, performing authentication and key agreement between the edge server and the user's logged-in device, and providing service to the user after completion; if no, selecting a cloud server to perform authentication and key agreement with the user's logged-in device, and providing service to the user after completion.

Abstract: A method for cross-non-cooperative domain identity authentication is provided. The method includes: utilizing routers in a core network to negotiate symmetric keys and global group keys to complete system initialization; performing user identity registration through a registration server, generating digital identity identifiers, anonymized identity identifiers, and MAC address lists, and establishing mapping relationships; users negotiating symmetric keys with adjacent routers and associating with MAC address lists; users encrypting anonymized identity identifiers based on address hopping engines and symmetric keys, embedding into data packet source IP addresses, randomly selecting MAC addresses as source MAC addresses, calculating integrity check codes, and completing data packet construction; uploading data packets to routers and performing intra-cooperative domain authentication and cross non-cooperative domain authentication.

Abstract: Provided is high-protein Saccharomyces cerevisiae and an application thereof. The provided Saccharomyces cerevisiae AMCC strain is preserved in the China Center for Type Culture Collection (CCTCC) on Jul. 27, 2021, and has a preservation number of CCTCC NO: M 2021941. The provided Saccharomyces cerevisiae strain has the characteristics of high biomass, high protein and high RNA.

Abstract: A method and an apparatus for actively defending against backdoor attacks under an edge computing scenario.

Abstract: A method and an apparatus for actively defending against backdoor attacks under an edge computing scenario.