71results about How to "Guaranteed tamper resistance" patented technology

The invention discloses a vehicular ad-hoc network data security sharing and storage system based on a blockchain technology. The vehicular ad-hoc network data security sharing and storage system based on the blockchain technology comprises a vehicle, a roadside unit, and a trusted institution. When data shared by the roadside unit, the vehicle performs digital signature on interactive informationby using a bilinear algorithm based on an elliptic curve to ensure the non-repudiation and integrity of the data; the roadside unit packs the collected data into a block, and uses the Byzantine fault-tolerant consensus mechanism to make the data block reach a coherent protocol across the network, thereby improving the fault tolerance of the system and making system more stable; after reaching theconsensus, the block is sorted by a smart contract in the roadside unit and stored in the blockchain, and other consensus nodes save the data synchronously; and the system rewards a corresponding number of data coins to the roadside unit, and then the data coins are assigned to the vehicle contributing the data by the smart contract, so as to keep the entire system active and stable.

The present invention discloses a dynamic encryption method, a terminal and a server. The method comprises: generating more than one secret keys and more than one signatures through native data; when the session connection is performed, selecting a predetermined first secret key index and random first signature index; according to the first secret key index and random first signature index, indexing a first secret key and a first signature from the more than one secret keys and the more than one signatures; employing the first signature to perform signature of the session request data, and employing the first secret key to perform encryption of the session request data and then send the encrypted session request data to a server; and after the server performs decryption of the session request data and the signature checking passes, receiving the session response data which employs random second signature to perform signature and employs random second secret key to perform encryption.

The invention relates to an integrated electronic record, signature and fingerprint system. The system comprises: (1) a police information resource database and a social information resource database for forming a sharable information resource database in a police intranet; (2) a comprehensive application platform based on police information; (3) an electronic fingerprint database constructed according to the requirement of standard fingerprint information collection of the ministry of public security and capable of being applied for special subjects; (4) a full text retrieval system; (5) a hybrid architecture using a C/S structure system, or a B/S structure or the combination of the C/S and B/S structure systems; (6) a unit adopting an MD5 algorithm for digital signature so as to ensure not to modify a generated record file, and a unit adopting Blowfish encryption algorithm for preventing leakage of the record data; and (7) a unit with integrated XML (extensible markup language) and WebService. The electronic record can greatly lower the case handling cost, improves the case handling efficiency, and can expand the information sources.

An electronic contract signing method provided in an embodiment of the present invention includes the steps of: sending the electronic contract including a signature authentication interface to a userin response to a user instruction; receiving a signature of a user on the signature authentication interface, and generating the signature into the electronic contract; acquiring a timestamp associated with the electronic contract and associating the timestamp with the electronic contract; an electronic contract including the signature and associated with the timestamp being encrypted by a presetencryption rule. The invention is applied to the field of house leasing. On the basis of electronically signing the contract, the invention ensures the tamperproof property of the electronic contractand the legal validity of on-line signing the contract through the time stamp and the encryption method.

The invention provides an audio/video live broadcast streaming media data transmission method in a P2P system. The method comprises the following steps of acquiring live broadcast streaming media source data; slicing the live broadcast streaming media source data according to a manner that each frame is used as the length unit and coding the live broadcast streaming media source data for obtaining media data packets; slicing the continuous media data packets according to a fixed length and performing code packaging for obtaining P2P data packets; and transmitting the P2P data packets to a playing client through a P2P network. The audio/video live broadcast streaming media data transmission method in the P2P system has advantages of minimizing network transmission expenditure, reducing requirement to bandwidth, and furthermore effectively ensuring no tampering of the live broadcast flow through a verification mechanism.

The invention discloses an application system based on quantum keys. The system comprises institution key management centers arranged at all institutions and used for providing unified quantum key services for application security and communication security, and a national key management center communicating with the institution key management centers of the institutions and responsible for distributing and sending the quantum keys or quantum key IDs for the institutions; and the two institution key management centers need to simultaneously initiate requests of obtaining the same quantum key to the national key management center. A barrier between an entity quantum network and a virtual application network is broken through, so that the high-security characteristics of the quantum keys arefurther extended to the service field, and further development of information security work is promoted; and by utilizing high security of the quantum network, the difficult problem of key distribution synchronization in the service field is solved, and the problems of the authority, credibility and security of key sources are solved, so that the confidentiality and the tamper-proofing performance of service information transmitted in an untrusted network are further guaranteed.

The invention provides a real-time early warning system and method of the highway passenger transportation violation based on a block chain. The real-time early warning system comprises a plurality ofpassenger mobile terminals, a mobile terminal wireless communication module, a cloud data storage server, a block chain data processing server and a block chain data storage server. According to thereal-time early warning system and method, the basic information of a driver is uploaded to the cloud data storage server through the mobile terminal wireless communication module; passenger GPS dataare collected through the passenger mobile terminals and transmitted to the cloud data storage server through the mobile terminal wireless communication module, and the block chain data processing server calls the passenger GPS data in the cloud data storage server for processing; and the block chain data processing server judges the violation behavior of the driver according to the overspeed early warning, overload early warning, fatigue driving early warning and malicious change of operation route early warning, and sends corresponding warning information to the driver through an intelligentcontract. The real-time early warning system and method have the advantages of timeliness of early warning data and non-tampering of violation information.

The invention provides a warehouse receipt pledge financing evaluation method and device based on a block chain architecture, and the method comprises the steps that a fund demand side node receives awarehouse receipt pledge financing request, and constructs an application evaluation information block according to the warehouse receipt pledge financing request; the financing cooperation platformnode carries out financing risk assessment on the warehouse receipt pledge financing request according to the application assessment information block, and constructs a financing risk assessment result information block according to a financing risk assessment result; the fund demander node constructs a financing submission confirmation information block according to the financing risk assessmentresult information block; and the fund provider node constructs a financing result information block according to the financing submission confirmation information block and the financing risk assessment result information block, and adds the financing result information block into the blockchain. According to the technical scheme, the safety and efficiency of warehouse receipt pledge financing evaluation are improved, and the development of warehouse receipt pledge financing business is greatly promoted.

The invention discloses an electronic seal system based on a time stamp and GPS location. The electronic seal system comprises a client, a server and a GPS base station, wherein the client and the server are respectively in communication connection with the GPS base station; the server consists of a core layer, a management layer and a service layer. An electronic seal method based on the electronic seal system comprises the following steps: firstly, preparing a ready credible time source, a credible position and key information, after calculating a digital digest by the client, sending to the server, reading the credible time and a credible position of the client from the GPS base station by using the server, signing the digital digest, the credible time and the credible position by the server, returning a file to the client after the time stamp and a locating position file are generated, verifying the returned file by the client, then binding the file and an original text together, and storing. According to the electronic seal system and the electronic seal method disclosed by the invention, the GPS system is utilized to locate the time and the position of a seal file of the client, the time and the position of carrying out operation in the electronic seal process can be locked, and the tampering and disavowing resistances of the file can be effectively ensured.

The invention relates to an object-oriented security chip and an encryption method thereof. The security chip comprises a central processing unit (CPU), a symmetric cryptographic algorithm unit, an asymmetric cryptographic algorithm unit, a communication unit, a security protection unit, a data storage unit, an interruption source and a timer/counter, wherein the CPU is used for coordinating other functional modules in the security chip to ensure the normal operation; the symmetric cryptographic algorithm unit is used for implementing encryption and decryption operations on the data by adopting a national secret symmetric cryptographic algorithm; the asymmetric cryptographic algorithm unit is used for achieving signing and signature verification of digital certificates and calculating message abstracts and key negotiations between two communication parties by adopting a national secret asymmetric cryptographic algorithm; the communication unit is used for performing data communication; the security protection unit is used for guaranteeing the normal operation of the security chip; the data storage unit is used for storing keys; the interruption source is used for initiating an event interruption request to the CPU; and the timer/counter is used for counting and timing during the operation of the security chip. The encryption method of the security chip comprises the following steps: separately establishing a transmission layer security link and an application layer security link, and achieving the secure transmission of the information by adopting a transmission layer and application layer dual-layer protection mechanism.

The invention discloses a session security processing system, equipment, device, and method. The session security processing system comprises a client and a server; the client respectively encrypts user authentication information and a generated random key according to a set algorithm and a locally stored public key certificate at the session authentication stage, generates ciphertext information that contains the user authentication information and the random key, sends the ciphertext information to the server, receives encrypted session information transmitted by the server containing a session identifier and a session key, and decrypts the session information to acquire the session identifier and the session key; and the client encrypts transmitted data according to the session key in the received session information at the session communication stage, and generates a ciphertext data packet containing the session identifier and the transmitted data and transmits the ciphertext data packet to the server. The scheme provided by the invention can improve the session security.

The invention discloses a book copyright protection platform and device based on a block chain and a medium. The platform comprises: a copyright registration module which is used for signing book information based on a digital certificate issued by an authorization center and writing the signed book information and timestamp information into a block chain; a copyright verification module which isused for verifying the signature of the book information written into the blockchain; and an infringement detection module which is used for detecting published information of a preset website according to the book information so as to determine whether the published information infringement exists or not. Through the platform, the identity of the book author can be effectively verified, the bookcopyright of the author is ensured, and meanwhile, the book copyright information in the blockchain is maintained not to be tampered.

The invention relates to a pit well cover, in particular to a pit well cover with mechanical password locks and cam locking locating. The pit well cover comprises a well cover base, a well cover matched with the inner diameter of the well cover base and a mechanical password lock arranged on the well cover. A mounting sinking table is arranged on the inner wall of the well cover base. The well cover is arranged on the mounting sinking table. An inner boss which protrudes inwards is arranged on the inner wall of the well cover. A mounting locating groove is formed in the inner boss. A mounting locating protruding block which protrudes outwards is arranged on the outer edge wall of the well cover. The mounting locating protruding block is matched with the mounting locating groove. At least two sets of mechanical password locks are placed on the well cover on the opposite face of the mounting locating protruding block. A locking device is arranged on the well cover. The locking device locates the well cover and the well cover base in a locking mode through the cam. Through the structure, manufacturing cost is lowered, safety is improved, stability is enhanced, and the prying resistance and the anti-vibration performance are improved.

The invention discloses an SCR emission-reduction detection control system and method for a diesel engine. According to the control system, whether the liquid level in a urea tank is lowered or not and whether or not a urea sprayer works normally or not can be detected through a detection control device, and then whether or not a whole SCR emission-reduction system works normally or not is judged;and when it is found that the SCR emission-reduction system is abnormal, a signal is sent back to an ECU system of a whole vehicle in time, and the power of the engine is limited through an ECU of the whole vehicle. By adoption of the SCR emission-reduction detection control system for the diesel engine, the working condition of the SCR system can be detected and recoded on board after the dieselengine is started; the system can be matched with an original on-board diagnosis system to form a dual-detection system, so that the detection reliability is ensured; after the diesel engine is started, the system detects and records the working condition of the SCR system on board to control the power of the whole vehicle, and the power of the engine is limited, so that pollution is prevented from further aggravated; and the system can be additionally arranged easily and rapidly based on an existing on-board detection system, an anti-tamper can be achieved to prevent a driver to refitting the system without permission, and thus, reliable operation of the SCR system is ensured.

The invention discloses a one-click forensics supervision system and method for commodity traceability information, and relates to the technical field of internet platforms. The system comprises an electronic forensics system for solidifying evidence of received electronic files and generating a fixation report, and also comprises a forensics supervision platform integrated with the electronic forensics system. The forensics supervision platform is used for obtaining a forensics request, performing one-click forensics operations on the obtained product complaint report information, collectingthe traceability electronic account information in real time, generating electronic files and submitting the files to the electronic forensics system, and is also used for recording evidence fixationinformation and displaying fixation reports. Through the application of the system and method, the timeliness of electronic forensics, the authenticity of electronic data, the tamper resistance and the effectiveness of electronic evidence can be improved in the inspection work; non-destructive forensics of electronic forensics is realized, in order to ensure the authenticity of the data; the "original copy" is fixed, to ensure the integrity of the data, to solve the problem that third parties do not cooperate with forensics.

The invention discloses a method and device for managing scores based on a block chain and a medium. The method comprises the steps of enabling a first node to receive a request for writing student score information into the block chain; invoking endorsement logic in the block chain to verify the student score information, and endorsing after the student score information passes the verification to form first information; and selecting a second node participating in consensus according to the information of the first node, wherein the second node determines whether to write the first information into the block chain. According to the method, the characteristic of decentralization of the block chain is utilized; each school reserves one piece of score data; authenticity and tamper resistance of scores are guaranteed; tamper difficulty is increased due to multi-node distributed storage; and the scores of one person in each stage are public and transparent.

The invention discloses a fast on-line electronic bid opening method in the electronic bidding transaction process. The method comprises utilizing digital certificate + Web technology to realize usersign-in on bid opening timeline, online decryption of tender documents, Online bid evaluation process, and the use of digital identity authentication to achieve security, the system uses Web 2.0 three-tier architecture, can support a large number of bidders simultaneously bid opening, bid singing, improve the efficiency of bid opening evaluation more than 20 times, and bidders do not need to go tothe trading center to achieve electronic remote bid opening, greatly reducing the bidder bidding costs. The invention realizes the authentication of the user identity by using the public key algorithm built in the digital certificate through the cooperation of the client end and the server end. As the private key is stored in the digital certificate, it can not be read in any way in theory, so itensures the security of user authentication, and ensures the user sign-in anti-tampering and anti-repudiation.

The invention discloses a cross-network dynamic service flow verification method and system, a storage medium and computing equipment. The method comprises the steps of uploading node address information and a public key to a blockchain through a PBFT consensus mechanism, and achieving the network access application of a node and the distributed secret key storage for a self-signature certificate.Aiming at the service request behavior of the node, based on a consensus mechanism of a block chain, the distributed verification node carries out verification, service serial number generation, service abstract uplink storage and service flow permission return on the node identity to realize cross-network service request uplink recording. Aiming at a service completion requirement required by across-network service flow in sequence, real-time service and processing node information are uploaded to a block chain by introducing a service completion identification mechanism, so as to realize effective verification of service continuity. Aiming at the situation that the cross-network service is tampered in the transmission process, a historical routing path tracking technology is utilized to mine malicious network segments possibly existing in cross-network service flow transmission, and the possibility of tampering the service flow again by the malicious network segments is reduced byidentifying bad routing nodes in the retransmission process.

The invention discloses a satellite network security routing method based on blockchain, and belongs to the technical field of communication and is based on the blockchain technology, and the method comprises the following steps: an initialization stage: registering all legal satellite nodes, packaging registration information into a registration information block, and writing the registration information block into a registration blockchain; in the system operation stage, a source node generates an LSA describing the node, signs the LSA, encapsulates the LSA into an LSA block and writes the LSA block into an LSA blockchain; when the destination node writes in a new LSA block, triggering LSDB update (including adding, replacing or deleting LSA) of the destination node, and then calculatinga route by using an SPF algorithm; and when the system detects that unpredictable interruption occurs in a certain link, the KGC sends a request for updating the credentials to the nodes involved inthe link. In this way, the authenticity and integrity of the LSDB can be guaranteed through the LSA blockchain, and then safe and reliable routing is calculated through the LSDB.

The invention provides an electronic commercial acceptance bill financing method and device based on a block chain architecture. The method comprises the steps that: a developer node adds a constructed service agreement block of a financing service platform to a block chain, and a presale fund supervision bank node adds a constructed developer supervision account fund balance block to the block chain; the developer node adds a constructed contract block with an upstream enterprise into the block chain; the developer node adds a constructed electronic commercial acceptance bill block issued according to the supervision account balance into the block chain; an upstream enterprise node constructs an application electronic commercial acceptance bill financing block according to financing requirements, and adds the application electronic commercial acceptance bill financing block into the block chain; a financing service platform node performs risk assessment on an electronic commercial acceptance bill financing request, and adds a constructed financing risk assessment result information block into the block chain; and a fund party node performs financing assessment according to the financing risk assessment result information block, and adds the constructed financing result information block into the block chain. The above technical scheme improves the security and efficiency of electronic commercial acceptance bill financing, is beneficial to commercial credit billing, and greatly promotes the development of bill market business.

The system comprises information transmitting and receiving ends. The transmitting end consists of a global greation module receiving primary page content and a Harsy algorithm module receiving primary page content which greate global data and harsy data, a character string superimposis receiving global data and Harsy data generates character string and a digital sign module receiving the adding character string generates digital sign data. A stop signal is sent out when the digital sign data is different from Harsy data, otherwise a exact informatino content global is sent out. The global transmitting is sotpped as soon as the stop signal is catched bysystem. The system can find any distortion for graded global and page content to ensure facticity and reliability of graded global.

The invention provides a warehouse receipt authentication method and device based on block chain architecture, warehouse receipt authentication participant nodes form block chain nodes, and the blockchain nodes comprise authentication demander nodes and authentication provider nodes; The warehouse receipt authentication method based on the block chain architecture comprises the steps that an authentication demander node receives a warehouse receipt authentication request, constructs an application authentication information block according to the warehouse receipt authentication request, andadds the application authentication information block into a block chain; And the authentication provider node performs authentication evaluation on the warehouse receipt authentication request according to the application authentication information block, constructs an authentication result information block according to an authentication evaluation result, and adds the authentication result information block into the blockchain. According to the technical scheme, the safety and efficiency of warehouse receipt authentication are improved, and the development of warehouse receipt pledge financing business is greatly promoted.

The invention discloses a prisoner management system and device based on a block chain and a medium. The system comprises an acquisition module used for acquiring criminal penalty information of a prisoner and prize and penalty conditions of the prisoner in a prisoning period; a calculation module which is used for calculating points of the prisoner based on a preset intelligent contract accordingto the criminal penalty information and the prize and penalty conditions of the prisoner; and a publishing module which is used for writing the criminal penalty information, the prize and penalty conditions and the points of the prisoner into a block chain network. Through an integration method, the prisoner can be prompted to obey supervision and compliance management carefully, prisoner relateddata is stored through the blockchain network, it is ensured that the data is not maliciously tampered, the authenticity of the data is ensured, and good management of the prisoner is facilitated.