41results about How to "Unforgeable" patented technology

The invention discloses a signature verification method and a device. The signature verification method can include the following steps: receiving a signature request, wherein the signature request contains abstract information of a file and a sender identifier; generating a random number; generating a signature of the file according to a signature generation algorithm and based on the random number, the abstract information and the sender identifier; and saving the signature to a block chain, and returning the random number to a sender sending the signature request. Through the technical scheme of the invention, an electronic signature can be realized without a USB key.

The invention discloses a certificateless multi-receiver signcryption method with a multivariate-based cryptosystem. The certificateless multi-receiver signcryption method is used for solving the technical problem of poor security of an existing certificateless signcryption method. The technical scheme includes that the method includes: firstly, using a key generation center to generate system parameters, and selecting a secure multivariable encryption algorithm to generate keys; and enabling a user U to obtain system private keys of the key generation center and generate the private keys to user keys prior to that a user Alice with the identity IDA sends signcryption messages to a user group L={ID1, ID2,...,IDt}, and accepting or refusing ciphertext sigma by means of un-signcryption. By the aid of the multivariate-based cryptosystem, high security of anti-quantum computation is achieved, and the certificateless multi-receiver signcryption method is still high in security facing attack of a quantum computer. Compared with the background art, the certificateless multi-receiver signcryption method is small in computation and high in security, has the advantages of completeness, confidentiality, unforgeability, forward security, backward security, receiver privacy protection and the like and is capable of resisting existing known attack.

The invention discloses a novel procuration signature and verification method based on integer factorization problems. The novel procuration signature and verification method based on the integer factorization problems includes the steps: before a network operates, firstly generating personal public keys and private keys by original signature people and procuration signature people, and issuing the public keys; when signature requests are provided, generating authorization letters by the original signature people, and calculating signature authorization based on a chameleon hash function and an ordinary digital signature algorithm, sending the signature authorization to the procuration signature people, carrying out validity verification on the received signature authorization by the procuration signature people, if the signature authorization is effective, generating the procuration signature based on collision property of the chameleon hash function, and digital signature does not need to be carried out on information, when a verifier receives the authorization letters and the procuration signature, firstly, verifying whether the authorization letters are effective or not, after the authorization letters are verified to be effective, and then verifying validity of the procuration signature. According to the application of the novel procuration signature and verification method based on the integer factorization problems, processing efficiency of the procuration signature is high, and the length of the procuration signature is short. The novel procuration signature and verification method based on the integer factorization problems is suitable for environments such as mobile networks and the wireless networks where computing power and network bandwidth are limited.

The invention discloses a public key encryption method for supporting multi-keyword search to resist the attack of keyword guess. The method comprises the following steps: a data owner and a data receiver are registered as a legal authorized user in a trusted third party; the trusted third party runs the global parameter generation algorithm, outputs the global parameter set and sends it to the cloud server, the authorized data owner and the authorized data receiver. The data owner receives the global parameter set and sends the encrypted document set and the keyword ciphertext to the cloud server. The data receiver receives the global parameter set, constructs the keyword trap according to the query sentence, and sends the keyword trap to the cloud server. The cloud server receives the global parameter set, encrypts the ciphertext document, the keyword ciphertext and the keyword trap, and returns the satisfied ciphertext document to the authorized data recipient by running the test algorithm verification. The invention effectively solves the problem of keyword guess attack, realizes keyword search, and has obvious advantages in computational efficiency and communication cost.

The invention discloses a product traceability system. The system comprises a traceability information acquisition client, a wireless communication module and a cloud platform; the cloud platform comprises a background information management module, a two-dimensional code generation module, a database and a traceability module; the background information management module enters product processingrelated information in advance; the traceability information acquisition client acquires traceability information and sends the traceability information to the cloud platform; the database is used for storing the traceability information of each process flow of a processing process and the traceability QR code labels of corresponding batch products; the traceability module is used for obtaining corresponding traceability information from the database according to the traceability QR code labels when receiving a traceability request sent by the scanning of the traceability QR codes by a user,and transmitting the traceability information to a user terminal; and therefore, traceability operation is completed. According to the product traceability system of the invention, a modern data storage transmission technology is additionally adopted on the basis of a product actual management process; and therefore, the requirements of safety management can be satisfied, the transparency and clearness of a production process can be promoted, and it is can be ensured that the traceability data of the whole process are authentic and unforgeable.

The invention discloses a broadcast signcryption authentication method, which comprises the following steps that: 1) system parameters are set; 2) a broadcast center calculates public key signature according to the parameters, and uses a user secret key to encrypt message to be broadcasted; 3) the broadcast center broadcasts the encrypted message acquired in step 2) to a user group; and 4) the user receives the encrypted message broadcasted in the broadcast center, uses a private key to decrypt the signature and verifies the validity of the signature. The method carries out two-layer confidential encapsulation of signature and encryption for the message, and broadcasts and mass-sends different messages to a group of users in once broadcast; and only specific authorized users can receive the designated message; therefore, the method has high-strength information confidentiality, signcryption information unforgeability and signcryption information non-repudiation. The method can regulate legal user groups at any time according to actual demand, but does not need to newly distribute new shared secret keys, has high flexibility, can make full use of communication bandwidth, saves cost, and greatly improves the communication efficiency.

The invention provides a registration system and a registration method for a full hardware terminal in a cloud desktop system. The registration system comprises a terminal identity information module, a terminal identity management module, a registration server and a registration information database; the terminal identity information module and the registration information database are both connected with the registration server; the terminal identity information module and the terminal identity management module are both connected with the registration information database; the terminal identity information module is positioned above terminal equipment, is composed of hardware of the terminal equipment as well as configuration and certification information stored inside the terminal equipment, and is used for authentication of the terminal equipment; the terminal identity management module is used for managing identity information, and is used for creating, registering, authenticating and managing terminal identity information. According to the system and the method provided by the invention, the registration of the terminal equipment and the storage of the configuration information of the terminal equipment are realized, so that the terminal equipment has unforgeability, and the safety and the reliability of the terminal equipment in the cloud desktop system are improved.

The invention discloses a blockchain medical data management method based on distributed attribute signature and a system. The method comprises the following steps of S1, generating a global parameterof the distributed attribute signature and selecting a Hash function; S2, producing a signature secret key and a verification secret key which correspond with each attribute by each attribute authority mechanism; S3, generating a signature secret key set which corresponds with the global identity identification and the attribute set of a user by the user; S4, after generating EHR data by the user, storing the signature in an off-chain database, performing address signature on the HER data, and issuing the address signature in the blockchain; and S5, firstly verifying the signature attribute of the address which is stored in an on-line transaction by the user, and finding the EHR in the off-chain database through the address and verifying the attribute of a data signature person. The blockchain medical data management method and the system have advantages of protecting identity information of the signature person, realizing EHR data safe sharing over different CDO systems, and settlinga problem of blockchain storage capacity limitation through an on-chain and off-chain coordinated storage mode.

The invention discloses an archive secure storage and sharing system based on a hybrid block chain and an implementation method, belongs to the field of archive sharing, and aims to solve the technical problem of how to realize archive privacy protection, prevent archives from forging and tampering, enable authorized access of the archives, and improve the archive sharing speed. According to the technical scheme, the system comprises a storage layer which is used for storing shared files and protecting the files against tampering, and adopts an IPFS; a sharing layer which is used for recordinggenerated transaction information, providing evidences for tracing of the file sharing process, automatically executing identity authentication and guaranteeing safe sharing of files under the condition that no third party participates, and comprises a multi-layer block chain model and an intelligent contract on a block chain; and a user layer which is used for managing, updating, checking and sharing files, and is composed of participants. The method specifically comprises the following steps: initializing; identity registration and authentication; encrypting and storing the archives; and archive sharing.

The invention discloses an intelligent Internet of Things device authentication method and system based on a blockchain, and the method comprises the steps that equipment generates an identity label of the equipment based on a physical unclonable function, takes the identity label of the equipment as a public key of a searchable encryption algorithm, and generates a ciphertext; a registration center generates a private key of a searchable encryption algorithm corresponding to the equipment based on the smart contract and the distributed account book database, and distributes a public and private key pair of a group name and a ring signature algorithm to the equipment to complete registration of the equipment; an authentication center performs searchable encryption based on the identity label of the equipment by using an intelligent contract to realize personal login authentication of the equipment; and group login authentication of the equipment is realized based on a ring signature algorithm. According to the method, effective combined authentication can be implemented on the intelligent Internet of Things equipment, the intelligent contract is automatically executed, the problem of excessive resource consumption is reduced, the novel cryptographic algorithm is higher in calculation efficiency, and the safety of the system can be better ensured.

The invention discloses a user management system, which is characterized in that the system comprises a user registration login module, a user identity audit module, a transmission module, a block chain storage module and a block chain access module. An object of the present invention is to provide a user management system and a user management method based on the user management system in order to overcome shortcomings in the prior art.

The invention discloses a blockchain television lottery buying system, belonging to the field of lottery buying systems, the blockchain television lottery buying system comprises a blockchain management platform for controlling and managing an alliance chain, a lottery center management platform, a television lottery buying operation platform and a home terminal, uplink transaction information uploaded by the lottery center management platform, the television lottery buying operation platform and the home terminal is stored in blocks of all nodes managed by the block chain management platformin a distributed mode, and block management of lottery transaction data is achieved. According to the blockchain television lottery buying system disclosed by the invention, a blockchain technology iseffectively combined with a television, so that a credibility lottery buying platform which cannot be forged, tampered and traceable is formed among a lottery buying operator, a lottery buying supervisor and a user.

The invention provides an anti-detachment alarming method of on-vehicle positioning equipment, wherein an inner switch circuit is arranged outside. A detachment action is associated with a switch circuit. Once a detachment action occurs, the switch circuit can be destroyed in one time, thereby triggering alarming. When the positioning equipment (1) is torn off, the rubber surface of a middle area(5) is adhered to a positioned vehicle. When a random welding point is broken or a metal conductive film (2) is torn off, the switch circuit is switched off, and hereon alarming is activated. Comparedwith the prior art, the anti-detachment alarming method is advantageous in that the reliability reaches 100%; once the equipment is detached, alarming is performed for sure; and furthermore the anti-detachment alarming method has benefits and effects of no counterfeiting and no repetition.

The invention discloses a commodity anti-counterfeiting code batch generation method based on character string-to-picture encryption, and the method comprises the following steps: carrying out numeric data and 8-bit binary conversion of batch commodity identification codes representing the unique identity information of a certain batch of commodities, obtaining a binary sequence PB, and according to the number of the batch of commodities, obtaining the number of the batch of commodities, setting a commodity production serial number with a certain length; scrambling the sequence PB by using a chaotic signal, and filling layer by layer according to a self-defined three-dimensional binary matrix data hierarchical filling rule to generate a unified ciphertext picture; and generating different chaotic signals according to different production serial numbers of each commodity in the batch of commodities, and performing bitwise XOR operation on the chaotic signals and the unified ciphertext picture pixels in sequence, thereby generating anti-counterfeiting pictures of single commodities in batch, and further combining to generate the commodity anti-counterfeiting two-dimensional code. The commodity anti-counterfeiting code batch generation method provided by the invention is simple and feasible, has very high security and is not easy to crack, and the commodity anti-counterfeiting two-dimensional codes generated in batches have uniqueness and unforgeability.