3results about How to "Good attack" patented technology

This invention relates to the field of polymer degradable materials technology, specifically to a biodegradable material, its preparation method, and its applications. The material is based on modified polylactic acid (PLA), supplemented by antioxidants, plasticizers, flame retardants, and inorganic fillers in specific weight proportions. Its unique feature lies in the polymerization of lactic acid and epicatechin imidazole ammonium chloride polymer under stannous octoate catalysis, using chemical bonding to introduce the bioactive groups of epicatechin into the PLA backbone, significantly improving the material's biodegradation rate, mechanical properties, and thermal stability. The bioactive substances and ionic groups in this material promote microbial degradation, achieving complete decomposition in a composting environment within a short time. Simultaneously, through molecular-level reinforcement and ionic cross-linking effects, the strength, toughness, and high-temperature processing performance of PLA are effectively improved. This material can be widely used in disposable tableware, food packaging films, and biodegradable agricultural mulch films.

The invention provides a proton exchange membrane durability test method, and relates to the technical field of proton exchange membrane fuel cells, and the method comprises the following steps: respectively coating two sides of a proton exchange membrane with coatings, respectively attaching thin film layers to the outer sides of the coatings on the two sides, preparing a single cell, and carrying out durability test on the single cell by using a fuel cell test platform, the coating comprises a substance for accelerating chemical degradation of the proton exchange membrane. Compared with an existing test method for testing the durability of the proton exchange membrane by adopting a membrane electrode, the durability test method for the proton exchange membrane does not comprise attenuation of cathode and anode catalyst layers and attenuation of a gas diffusion layer, the durability rate of the proton exchange membrane can be truly reflected, and the method is simple in operation step, low in cost and high in practicability. The device is convenient, practical, free of hydrogen and low in cost.

The application discloses a differential fault attack method of a lightweight cipher GIFT based on a byte model, and comprises the following steps: obtaining correct cipher texts generated by using the GIFT algorithm to encrypt plaintexts without injecting byte faults and error cipher texts generated by encrypting the plaintexts after injecting byte faults, wherein the GIFT algorithm is encrypted through a plurality of S boxes; performing an exclusive or operation on the correct cipher texts and the error cipher texts to obtain output differentials of each corresponding S box in the encryption process of target plaintexts, and determining a target S box injected with a byte fault in the plurality of S boxes according to the output differentials of each S box and input differentials of each S box obtained in advance; determining an input value of the target S box in the encryption process of plaintexts without injecting byte faults as a correct input value of the target S box according to the input differentials and the output differentials of the target S box; and recovering an encryption key used by the plaintexts without injecting byte faults and the plaintexts with injecting byte faults through the correct input value of the target S box.