10results about How to "Resist attack" patented technology

The invention provides a modified epoxy resin water permeable brick and a preparation method thereof. The modified epoxy resin water permeable brick is prepared from the following raw materials in parts by weight: 95 to 105 parts of aggregate, 8 to 15 parts of modified epoxy resin, 1 to 3 parts of curing agent, 5 to 8 parts of composite filler, 0.1 to 0.3 part of exciting agent, 2 to 4 parts of self-repairing component and 1 to 3 parts of diluent. According to the water permeable brick, through the synergistic effect of the organic silicon modified epoxy resin and the special curing agent, the anti-aging performance of the material is improved. The introduced Si-O-Si bond can effectively resist the attack of ultraviolet photons; long-chain alkyl in the curing agent forms a compact physical barrier layer, so that oxygen and moisture permeation is greatly slowed down, the water permeable brick can effectively resist pulverization, yellowing and embrittlement in long-term outdoor use, the compressive strength and the water permeability coefficient of the water permeable brick can still keep an extremely high retention rate after long-term use, the service life is remarkably prolonged, and the water permeable brick is suitable for popularization and application. The industrial pain point that a traditional resin-based water permeable brick is easy to age is solved.

This invention relates to the fields of federated learning and cryptography, specifically to a secure three-party aggregation method for federated learning in the Industrial Internet of Things (IIoT). The method includes an initialization phase, a training phase, an online phase, and a verification phase. By setting up an architecture with one honest server and two aggregation servers, each server receives a portion of the secret share of local model gradient parameters sent by various IoT devices, thus protecting the privacy of local data. The honest server assists the two aggregation servers in interactively executing a three-party weight calculation protocol to calculate the secret share of the aggregation weights. They also interactively execute a three-party multi-weight aggregation protocol to calculate the secret share of the gradient parameters of the current aggregation model. Furthermore, a linear homomorphic hashing method is used to verify the correctness of the gradient parameters of the current aggregation model. This method solves the problems of low efficiency, weak security, and low robustness in federated learning during model training and aggregation, and can promote data flow and utilization in IoT scenarios.

The application provides a password-based authentication key agreement method based on a lattice, which allows a user to use a password to agree with a server on a session key and authenticate the user identity. The method is constructed based on an ideal lattice, and its security is established on a ring-based learning problem with errors, so that the method can effectively resist quantum attacks. The user's credentials are saved in the form of password-encrypted in the server end, and only the user with the correct password can decrypt the legal credentials and establish the subsequent session key. When the session key is established, the user and the server perform an authenticated key exchange with a key hiding attribute to prevent the user's credential information from being leaked. Even if an enemy obtains the user's password-encrypted credential ciphertext and exhaustively searches the password space to decrypt the ciphertext to obtain a possible user credential set, the correct password corresponding to the credential cannot be identified from the set, so the application can resist offline dictionary attacks. In addition, two-way key confirmation can ensure the consistency of the session key and verify the user identity.

The present application relates to the animal medical technology field, especially to the Streptococcus suis strain and the vaccine thereof for prevention and treatment, and provides Streptococcus suis type 2, type 3 and type 9 strains screened and obtained, and a trivalent inactivated vaccine prepared by mixing the three strains, which can safely and effectively prevent and protect against the attack of the three pathogenic bacteria of Streptococcus suis.

The application discloses a lattice public key data encryption and decryption method and a key encapsulation method based on vector decoding. The method comprises the following steps: obtaining first target ciphertext data according to predetermined plaintext data, a first predetermined encryption method, a first target public key and a predetermined interference term, so that lattice public key data encryption can be realized; obtaining target plaintext data according to the first target ciphertext data, a first target private key and a predetermined decryption method, so that lattice public key data decryption can be realized. Meanwhile, the application also proposes a variant problem of a ring learning with errors problem (RLWE), namely, a subset-sum parity RLWE (sspRLWE) problem, and further optimizes the lattice public key data encryption method based on vector decoding in the application based on the variant problem. The public key encryption method and the key encapsulation method designed in the application have the characteristics and advantages of provable security, resistance to quantum computer attacks, short public key and ciphertext length, high calculation efficiency, low decryption failure rate, flexible parameter selection and the like.

The invention discloses an unmanned aerial vehicle authentication and key negotiation system and method based on PUF and chaotic mapping, and relates to the field of information security and cryptographic protocol security. The system generates a unique challenge-response pair through an unmanned aerial vehicle terminal PUF module to complete registration, a four-way handshake mechanism is adopted in the authentication stage, a session key is dynamically generated in combination with Henon chaotic mapping, the number of chaotic iterations is hidden through XOR operation, and identity legality is guaranteed through multi-layer MAC verification. According to the method, secret keys do not need to be pre-stored, the PUF physical unclonability and the chaotic mapping sensitivity are utilized, anonymous authentication and forward security are achieved, lightweight computing adapts to unmanned aerial vehicle resource constraints, various attacks are effectively resisted, and communication security is guaranteed.

This invention discloses a secure computation method, apparatus, and chip for information. The method includes: during secure computation, obtaining the dividend and modulus of a modulo operation; determining a transformation constant for converting the dividend to the Montgomery domain based on the modulus, and secretly calculating a Montgomery modular multiplication factor based on the transformation constant and the modulus; dividing the dividend into multiple local dividends based on the transformation constant, and performing a matching Montgomery modular multiplication on each local dividend according to its position within the dividend and the Montgomery modular multiplication factor, obtaining multiple local modulo results; and calculating the modulo operation result between the dividend and the modulus based on the multiple local modulo results. The technical solution of this embodiment is based on an improved Montgomery modular multiplication algorithm, achieving fast and secure modulo computation during secure computation of information, improving the speed of modulo computation while resisting side-channel attacks.

The application discloses a cloud-assisted vehicle networking authentication key negotiation method, and a network architecture is constructed based on a vehicle-mounted unit, a roadside unit, a key generation center and a cloud server; in an authentication stage, the roadside unit broadcasts a vehicle authentication request message, and attributes of the vehicle are taken as identities to realize one-to-many mutual authentication and key negotiation. In the authentication stage, the vehicle does not need to explicitly specify an authentication object, only needs to send an authentication request message of the vehicle to roadside facilities, and the roadside facilities can broadcast the authentication request message, so that other vehicles meeting a condition can directly interact with the vehicle after receiving the message, and the calculation cost of the vehicle can be greatly reduced.

The invention provides a security session hardware acceleration system and method based on a zero-trust architecture. The system comprises a gateway control platform and a hardware data platform, the gateway control platform comprises a policy management module PAP, a policy decision module PDP and a gateway main CPU control unit; the hardware data platform comprises a secure session context acceleration engine ESC Engine and an encryption engine, and the secure session context acceleration engine ESC Engine comprises a high-speed policy execution unit PEU, a secure context storage unit SCU and a temporary zero clearing and control unit ZTCU; the gateway control platform transmits a compiled strategy to the hardware data platform through a bus and transmits an attribute key generated by analyzing an access request to the hardware data platform, and the hardware data platform generates a strategy decision and a security key and provides encryption and decryption services of application data, security storage of hardware isolation and an instantaneous zero clearing mechanism. According to the method, a zero-trust architecture is established by using hardware, and the safety performance is improved while low delay is realized.