6results about How to "Satisfy Integrity" patented technology

The invention belongs to the technical field of Internet security, and discloses a public Internet of Things privacy protection identity authentication method and system based on a block chain, which do not depend on a centralized server, adopts a storage mechanism based on a distributed hash table to realize data storage in a chain-on-chain and chain-off mode, realizes decentralized storage and improves the security of data. Identity sources of the sensor nodes are authenticated through an intelligent contract technology under the condition that real identities are not needed; the method has unforgeability under a random oracle model, and meets the security requirements of integrity, authentication, anonymity and traceability at the same time.

The present invention relates to the field of data security, and provides a method for secure sharing of plateau data based on blockchain. The main scheme includes: A. System initialization: Generate system parameters and initial blocks according to security parameters, and generate a private key and public key for each user who joins the blockchain; B. Data release and smart contract creation: The data owner stores the encrypted plateau data on the cloud server, and broadcasts the relevant meta information to the blockchain network to realize fast retrieval of on-chain and off-chain data. The data owner creates a smart contract to realize automatic access control of plateau data; C. Data authorization: The data requester retrieves relevant meta information on the blockchain according to demand, authenticates the authority through the smart contract, and obtains the data access authorization certificate; D. Data acquisition: The data requester obtains the re-encrypted ciphertext on the cloud server through the authorization certificate, decrypts the ciphertext locally with its own private key, obtains the plateau data, and verifies its integrity. The present invention can realize the automatic and secure sharing of data, and effectively ensures the confidentiality, authenticity, integrity, and controllability in the data sharing process.

This invention discloses a secure encryption method for the operating system kernel based on the AES algorithm, relating to the fields of operating system security and data encryption technology. The method comprises the following steps: S1, traversing and scanning the data in the operating system kernel, identifying sensitive data, and classifying it according to its sensitivity level; S2, generating an encryption master key and hierarchical subkeys based on the AES algorithm; S3, encrypting data of different sensitivity levels using AES encryption algorithms with different rounds and encryption modes; S4, dynamically updating the key and encrypting and storing the updated key in the kernel secure storage area; S5, adding a checksum to the encrypted sensitive data and verifying data integrity; S6, reading the corresponding key and decrypting the data to complete data access. This invention significantly improves key security and data integrity, effectively balances encryption efficiency and system performance, has strong adaptability and high practicality, and is easy to promote and apply.

The invention discloses a block chain-based medical Internet of Things lightweight identity authentication method, relates to the field of identity authentication, and solves the problems that an identity authentication scheme in a current medical Internet of Things environment is poor in user privacy protectiveness, limited in equipment resource, difficult to realize safe and efficient communication between users and poor in user experience. In order to solve the problems of unbalanced optimization in the aspects of security and performance overhead and the like, the method integrates certificate authentication and PUF authentication technologies through an initialization stage, a registration stage and an identity authentication stage, so that the security of the authentication process and the non-tampering property of the user identity are ensured. Through dual safeguard measures, the resistance of the system to identity forgery attacks is greatly enhanced, and a safer and more reliable authentication environment is provided for users. The combinable NFT is used for representing identity information of the patient and the wearable device of the patient, the user identity certificate serves as the parent NFT and is associated with the child NFT represented by the device, and efficient management of the user device is guaranteed.

The utility model discloses a novel double forced demolding mold structure which comprises a bottom plate, supporting plates are fixedly connected to the two sides of the outer surface of the upper end of the bottom plate, a lower mold frame is movably connected to the outer surfaces of the upper ends of the supporting plates, a mold is installed in the middle of the outer surface of the upper end of the lower mold frame, and a product is detachably connected to the outer wall of the mold. The outer surfaces of the two sides of the bottom plate are fixedly connected with limiting buckle bases. The novel double-forced-demolding mold structure disclosed by the utility model has the characteristic of two-time forced demolding ejection, can meet the completeness of the inverted shape characteristic after a product is molded, breaks through the bottleneck of a single-time forced demolding mold structure, meets the product requirements of customers, and is suitable for popularization and application. A sixth steel plate, a seventh steel plate, an eighth steel plate and a ninth steel plate are ejected out in two times through the ejection rod of the injection molding machine, and the mold and a product can be forcibly separated in two times through the ejection column, so that the completeness of the product is met, and the quality of the product is improved.

The invention discloses a copper deposition process of a DPC deep-hole ceramic substrate, and relates to the technical field of advanced semiconductor packaging, optoelectronic device manufacturing and precision electronic assembly, and the copper deposition process comprises the following steps: carrying out laser drilling on a ceramic substrate in a spiral drilling mode; and then sequentially carrying out porcelain slag cleaning, magnetron sputtering, chemical copper deposition and thick copper electroplating on the ceramic substrate. According to the method, copper can be coated on the inner wall of the deep hole of the ceramic substrate with the hole depth ratio exceeding 5 without depending on ionized physical vapor deposition and atomic layer deposition, the welding requirement and the bonding performance are met, and meanwhile the cost needed by three-dimensional interconnection packaging manufacturing is greatly reduced.