72results about How to "Prevent repudiation" patented technology

The invention discloses an artwork circulation, authentication and registration method based on a blockchain and an expert system. According to the method, registration for an authentication result of an artwork is completed by smart contracts of authentication markets, and then the artwork is allowed to be circulated and recorded in smart contracts of trading markets. According to the method, block information accumulated in the smart contracts of the authentication markets is utilized, and knowledge is acquired outside the blockchain by machine learning of authentication information, the expert system is established, and a need for the commodity authentication validity and authentication result checking is met through providing an authentication suggestion for the artwork of which an inquiry is to the expert system. In addition, under the premise of protecting the identity privacy of a trader from disclosure, the smart contracts of the trading markets and the smart contracts of the authentication markets are combined, and cultural relic registration is established to specifically record a circulation state and an authentication result of a cultural relic. Ultimately, decentralization is realized in a trading process of the artwork by virtue of the above-mentioned method, and gain effects of creditability, convenience and a low cost are achieved at the same time.

The invention discloses a big data oriented ownership confirmation method. An ownership confirmation process comprises an initialization phase, a sampling challenge phase and an ownership confirmation result chaining phase. The initialization phase comprises the steps that a certificate authority CA finishes signing various participating entity public key certificates of a network system, a data source provider P finishes selecting a signing key pair and an encryption key pair, blocking data and generating data block authentication information, and a third party ownership confirmation center T finishes authenticating block chain ownership registration commercial network B. The sampling challenge phase comprises the step that the third party ownership confirmation center T finishes sampling and authenticating data blocks. The ownership confirmation result chaining phase comprises the step that the block chain ownership registration commercial network B finishes registering an ownership confirmation result. The ownership confirmation method is the big data oriented ownership confirmation method based on the third party ownership confirmation center and a block chain, and the data ownership definition fairness and the completeness and credibility of the ownership result can be effectively ensured.

The invention discloses a digital certificate use method based on a block chain. The method comprises the following steps: receiving a digital certificate use application initiated by a client througha business background, and receiving biological feature information, submitted by the client, of application personnel; calling an identity authentication system to perform identity authentication onthe biological feature information; when the identity authentication is passed, confirming that the client acquires the digital certificate use permission, and calling a certificate service system toapply a digital certificate from a third-party mechanism, thereby enabling the certificate service system to provide digital signature or encryption service for the client by using the digital certificate, wherein the block chain storage system stores an electronic evidence related to the application use of the digital certificate. The invention further discloses a business processing system anda computer readable storage medium. The security and the convenience of the digital certificate use are improved, and the issuing cost and the use cost of the certificate are saved at the same time.

The invention discloses an adaptive retransmission and signature segmented embedding data transmission method, which is characterized by comprising the following steps of: matching the identity information of a user in a safety database by using a server, and finishing the method if the identity information of the user fails to be matched; performing mutual identity authentication on the user and the server, and finishing the method if the mutual identity authentication of the user and the server fails; and performing data transmission, and in a data transmission process, performing the steps of performing dynamic identity authentication on the server and the user at random time intervals, terminating connection if the dynamic identity authentication of the server and the user fails, embedding a signature in a segmented way, judging whether transmitted data has an error or is lost or not in an acknowledgement way, performing data retransmission if the transmitted data has the error or is lost, judging whether the data transmission is finished or not, and terminating the connection when the data transmission is finished.

The invention is applicable to the technical field of network communication, and provides an electronic logistics document management method and an electronic logistics document management device. Theelectronic logistics document management method comprises the steps of: receiving an order release request of a first user, wherein the order release request carries order information; generating a first logistics order of the first user based on the order information; and storing the first logistics order in a blockchain mode, and feeding back an order release success message to the first user after completion of storage. According to the electronic logistics document management method and the electronic logistics document management device, the generated first logistics order is stored in ablockchain mode, thus the tampering can be detected by means of the blockchain when the logistics order information is tampered, thereby avoiding the user from tampering or denying the released orderinformation, and ensuring the security and reliability of electronic logistics document information.

The invention provides a digital signature authentication method facing a mobile widget, which comprises the following steps that: a certificate is generated; a developer submits a developer certificate application to a registration authority RA in a certification authority, the RA audits related contents and determines whether to examine and approve a request of the certificate application, the RA submits the application request and information that the approval is passed to a certificate authority CA after the certificate application passes the approval, and the CA signs and issues the certificate; the signature is carried out; after the certificate application is approved to register, an application program at the RA end initializes information of an applicant, issues the certificate to the developer, sends a privacy key, the CA adds related information of the certificate applicant in a LDAP (Lightweight Directory Access Protocol) directory server, the developer signs a program passing compilation on a development platform after receiving the privacy key and uploads the signed program to a Web server; and the verification is carried out. The invention combines a public key infrastructure PKI and an oval curve encryption mechanism and implements the certificate application, the certificate issuing, the certificate acquisition, the widget signature and the widget verification of the mobile widget developer are implemented.

A data exchange method provided by the present invention includes the steps: a data sending end sends a data exchange request to a server; the server generates a session key according to the above request, and encrypts the session key and sends it to the data sending end ; The data sending end imports the ciphertext of the session key into the USBKEY of the data sending end, and after digitally signing and encrypting the data to be exchanged, designate the data receiving end that receives the data; the data The sending end packages the public key certificate of the data receiving end, the data ciphertext and the digital signature of the data and sends it to the server; the server parses the public key of the data receiving end from the public key certificate of the data receiving end, and uses the public key Encrypting the session key and adding the ciphertext of the session key into the data packet and sending it to the data receiving end; the data receiving end decrypts the data ciphertext in the data packet. This enables efficient enterprise-level data exchange.

The invention provides methods and devices for generating and distinguishing an anti-counterfeiting paper document. In the method for generating the anti-counterfeiting paper document, document information, an electronic signature, an anti-counterfeiting ciphertext, an anti-counterfeiting signature picture and a data storage carrier are bound together, so that the generated anti-counterfeiting paper document has functions of preventing repudiation, preventing tampering and preventing copying. In addition, the distinguishing method can distinguish whether the anti-counterfeiting paper document is signed by a signer, tampered and copied; further, the anti-counterfeiting paper document can be comprehensively protected, and the safety of the anti-counterfeiting paper document is improved.

The invention provides an information matching method and a device, the methods include: a match initiating side sends information matching request to a match initaiating recipient, the matching recipient verifies the information in the information matching request, if the verification passes, a first response to the information matching request is constituted, sending to the matching initiator, verifying the information in the first response after the matching initiator receives the first response, if the verification passes, sending a second response to the matching receiver, obtaining a first calculation result according to the first commitment and the second commitment by the matching initiator, obtaining a second calculation result according to the first commitment and the second commitment by the matching receiver; after receiving the second response, the matching receiver compares the first calculation result with the second calculation result. If the comparison result is equal,the matching is successful. If the comparison result is not equal, the matching fails. The invention solves the technical problem that the accuracy of the matching result is not high in the prior art.

The invention discloses a registration-free access control and smart lock registration and unlocking method, device and system. The method comprises the steps that S1, a mobile smart device obtains a two-dimensional bar code in a first display screen of a registration device; S2, the two-dimensional bar code is sent to a server; S3, the server receives the two-dimensional bar code, carries out networking query and verification on real name information registered by a mobile smart device user, generates a ciphertext two-dimensional bar code instruction after the query and verification are successful and passes back the ciphertext two-dimensional bar code instruction to the mobile smart device, and the server stores operation time, verification content and result; S4, the mobile smart device displays the received ciphertext two-dimensional bar code in a second display screen;S5, the registration device identifies the ciphertext two-dimensional bar code; and S6, the registration device decrypts the ciphertext two-dimensional bar code, if the decryption is successful, registration verification is finished, and if the decryption is unsuccessful, the verification is terminated and prompt is sent. According to the method provided by the invention, the privacy of a visitor is protected through network verification.

The invention discloses an anti-repudiation method of transaction information, a client and a server, and the method comprises the steps: generating a client private key, a client public key, requestinformation and a request identification, transmitting the client public key to the server, and receiving a server public key generated by the server; encrypting the request identifier and the requestinformation by using a first symmetric key to generate a first ciphertext; encrypting the first symmetric key by using the client private key to generate a second ciphertext; sending the first ciphertext and the second ciphertext to the server; and receiving and decrypting the information returned by the server by using the server public key to obtain the request identifier and the response information. According to the method provided by the invention, repudiation of a client or a server can be prevented, so that normal transaction is ensured, and the user experience of two communication parties is improved.

The invention discloses an anonymous auction method and device based on a block chain and a medium. The method comprises the steps of obtaining auction information of auction products, and uploading the auction information to an anonymous auction block chain; obtaining auction information of an auction end, wherein the auction information at least comprises auction bids; randomly generating randomdata based on the auction bid according to the smart contract, and calculating a hash value of the sum of the auction bid and the random data; and comparing the auction bid with the current highest bid on the anonymous auction block chain according to the smart contract, and if the auction bid is higher than the current highest bid, uploading the auction bid and the hash value to the anonymous auction block chain to form a new current highest bid. According to the method disclosed by the invention, the privacy leakage risk in the traditional auction process can be effectively reduced, and theauction end is anonymous on the premise that the whole process is public and verifiable; and in the auction process, the third-party supervision terminal can obtain key data in the auction process, and the auction end can verify the correctness of the auction result.