9results about How to "Enhanced non-repudiation" patented technology

The invention provides a financial information management method and system based on a block chain technology. The method comprises the following steps: receiving a financial transaction request initiated by a user, and performing hash operation on a data block to generate a hash value of the data block; based on the hash value and identity verification information of the user, generating an encrypted signature by using an improved elliptic curve digital signature algorithm, and binding the transaction time of the preliminary transaction proposal with the encrypted signature by using a timestamp service; broadcasting the data block corresponding to the preliminary transaction proposal and the encrypted signature to a plurality of nodes by using a distributed network so as to determine an effective financial transaction; and linking the data blocks corresponding to the effective financial transactions to a preset block chain according to a time sequence and a logic relationship based on a Merkle tree structure, and regularly checking the consistency and integrity of data on the chain. The financial information management method which is high in safety, cannot be tampered and is traceable can be provided, and the safety of financial transactions is improved.

The invention discloses a natural person identity encryption real-name authentication method and system, and relates to the field of identity and data security. The method is based on a'natural person-encryption terminal-authentication server 'closed-loop encryption architecture, an identity identifier capable of directly recognizing a natural person is not collected, and the core comprises five steps of information collection, authentication initiation, identity authentication, dynamic identity password generation, closed-loop verification and result synchronization. The system adopts a three-level distributed architecture and is composed of an encryption terminal and an authentication server, and the encryption terminal and the authentication server cooperate to achieve secret key fragmentation management, encryption communication and auditing tracing. According to the method, the principle of minimum necessary collection is followed, the national secret algorithm, secret key fragment storage and block chain evidence storage technology are combined, identity authentication is unforgeable, uncounterfeitable and traceable, sensitive information leakage is eradicated from the source, compliance cost is reduced, the method is adaptive to multi-field and multi-terminal scenes, related laws and regulations are met, and high safety and practicability are achieved.

The embodiment of the invention provides a security authentication method and device, and relates to the technical field of security. Comprising the following steps: receiving a first request message which is sent by a terminal and is used for acquiring a dynamic password, wherein the first request message comprises a first terminal identifier of the terminal; acquiring a first geographic position of the terminal according to the first terminal identifier; and generating a first dynamic password based on the first geographic position, and sending a first response message including the first dynamic password to the terminal. The invention can provide a more convenient, economical and efficient identity authentication method, the cost of identity authentication is saved, carrying of authentication equipment is avoided, the user experience is improved, meanwhile, the first dynamic password can be used for further verifying the geographical location information of an identity authenticator while completing identity authentication, and the user experience is improved. And the non-repudiation and reliability of identity authentication are improved.

The present invention provides a key management method and device, which are applied to group communication. The connection between group members adopts a tree structure. The method comprises: based on a preset trigger item, according to the group key when the trigger item occurs, and a random number or an identity identifier of a newly added node in the tree structure, a new group key is generated, and the group key when the trigger item occurs is updated; wherein the trigger item includes node joining, node leaving, a preset time period, subgroup leaving and subgroup joining, and the random number is generated by a root node in the tree structure; each node of the present invention independently completes the update of its own group key, thereby avoiding a man-in-the-middle attack in key distribution and improving the freshness and confidentiality of the group key.

The invention relates to the technical field of network security anomaly detection, and discloses a collaborative analysis-based lost host detection system and method, and the system comprises a cyberspace detection module which is configured to obtain cyberspace behavior information of a target host, and carry out the detection of a lost host based on a graph neural network and a K-means clustering method, determining a host failure behavior; the network space behavior information comprises network flow information and network log information; the physical space detection module is configured to obtain physical space behavior information of a target person and perform abnormal behavior detection based on a face recognition and physical abnormal behavior recognition method; and the collaborative analysis module is configured to perform mutual verification and conjoint analysis on the results of the lost host detection and the abnormal behavior detection so as to realize conjoint analysis and conjoint tracing of lost host events in a network space and a physical space. According to the invention, the reliability of host failure detection can be improved, and the influence and loss caused by hostile attack behaviors are reduced.

The application discloses a payment transaction encryption verification system of multi-factor identity authentication, relates to the technical field of payment security authentication, and comprises a registration management, real-time data acquisition, risk decision, multi-factor authentication, token generation and transaction verification module. When the payment transaction is initiated, the system dynamically calculates an environmental risk index by analyzing network environment characteristics in real time, and selects a required authentication factor combination for verification in real time according to the index. The system uses an encryption synthesis algorithm to fuse and calculate a plurality of generated independent authentication results and transaction plaintext information, generates an encrypted payment token, and sends the token to a payment gateway to complete decryption and comparison verification. The authentication strength is intelligently and dynamically adjusted according to the environmental risk, the identity authentication evidence is deeply bound with the transaction information by using cryptography, and the security and reliability of the transaction process are improved.

According to the dance work proof system and method based on the virtual clones, the posture of a user is captured through a sensor and a motion capture technology, then the virtual clones are generated in combination with an imaging technology, the virtual clones and the posture of the user are made to maintain consistent motions, and after the virtual clones are generated, the virtual clones are sent to the user; and allowing dynamic adjustment of actions of the virtual clones and generation of corresponding adjustment records, and allowing input of dance making notes. Then, the posture of the user, the adjustment record and the dance editing note are used as dance proof information to be stored, and the dance proof information is signed and then published to a block chain network to serve as proof basis of dance work, so that the technical effect of improving proof convenience and non-repudiation of the dance work is achieved.

This invention relates to the field of electronic payment technology, and discloses a method and system for electronic evidence preservation for transaction security. The method includes: injecting a payment request as an evidence preservation identifier into the transaction data of a payment gateway to generate evidence-preserving transaction data; extracting key elements of the transaction and binding them with the user's payment identity credentials to form a structured evidence preservation instruction; performing a hash operation on the evidence-preserving payload of the instruction to obtain a digital digest; constructing a trusted evidence preservation data packet by combining a timestamp and the digital digest; generating an evidence preservation completion receipt by associating index information with the evidence preservation identifier as the main body; and digitally signing the receipt to finally obtain a digital evidence preservation certificate. This invention can enhance the evidentiary effect of electronic evidence preservation for transaction security.

The present disclosure provides an electronic contract signing method, device, electronic device and storage medium. It relates to the field of computer technology. The method includes: in the process of generating a signed electronic contract of a target electronic contract to be signed, obtaining the electronic signature information and signature timestamp signed by the contract signing end on the target electronic contract to be signed, and obtaining the session key ks‑naf negotiated by the contract signing end when performing GBA authentication with the network side device, encrypting the mobile phone number information corresponding to the contract signing end according to ks‑naf, and processing the target electronic contract according to the electronic signature information, signature timestamp, message digest of the target electronic contract and encrypted mobile phone number information to obtain a signed electronic contract. As a result, the obtained signed electronic contract is not easily tampered with, the tamper-proof property of the signed electronic contract is guaranteed, and the security of the signed electronic contract is enhanced.