36results about How to "Tamper resistant" patented technology

The present invention relates to security label (12) for securing or authenticating goods or services or a security document. Currently radio frequency ID cards, having an inductive loop and a microchip containing security information, are used. However, such RF ID cards are expensive to manufacture. Therefore it is proposed to use a security label or document (12) including a terahertz image or tag (14, 15, 76) which may beta hologram. Security information can then be read by reflection or transmission of terahertz radiation which is not visible to the unaided eye. The terahertz image or tag may be covered by a material (66, 68) opaque to visible light, but transparent or transmissive of terahertz wavelengths, making it difficult for potential fraudsters to investigate the terahertz image. A method of making such a security label or document, a security or authentication method and system using terahertz radiation are also disclosed.

Disclosed are various devices useful as components of a system for authorizing purchases associated with a vehicle that are generally simple to install, operate and maintain and are generally resistant to abuse. Devices disclosed include theft-resistant vehicular identification tags, sealed identification tag reader and variable range tag-readers.

The invention discloses an Internet of vehicles malicious node detection system and method for an integrated block chain consensus mechanism. Messages sent by a vehicle sending node Vi and identity information of a vehicle sending node Vi are packaged into a request authentication data packet to be sent to RSU via any vehicle receiving node Vj; after receiving the data packet, the RSU performs mutual identity authentication with the Vj; if the mutual identity authentication is passed, the RSU forwards the received data packet sent by the Vj to a TA; according to the traceability of a databaserecorded by a block chain, digital signature and information authentication are performed by using a RSA algorithm; the consensus mechanism is used for detecting whether the vehicle node is a malicious node through combining with the current state of the vehicle node. According to the method, the characteristic that the data recorded by the block chain is not easy to tamper is used, the maliciousvehicle in the Internet of vehicles can be efficiently and accurately detected, meanwhile, the problems of decentralized management and privacy protection of the Internet of vehicles also can be solved, and thus the problem that in the Internet of vehicles, the detection accuracy of the malicious node is low is solved, and the network overhead is effectively reduced.

The embodiment of the invention provides a data storage method and apparatus. The method comprises the following steps: determining a first storage node from a second node according to received feedback information corresponding to a data storage request sent by the second node for broadcast, encrypting to-be-stored data by using a preset public key, and encoding the encrypted to-be-stored data toobtain an encoding result; dividing the encoding result into data blocks, and adding a digital signature generated by using a private key corresponding to the public key to each data block; and determining a storage node of each data block with the added digital signature, and sending the data block to the determined storage node for storage. By application of the scheme provided by the embodiment of the invention , the data storage security can be improved.

A grinder device is provided. The grinder device may include a container, a cap assembly configured to be friction-fit to the container such that the cap assembly is removably lockable to the container, and a grinding mill disposed within the cap assembly to perform a grinding operation of condiment disposed in the container. The grinding mill may include a movable grinder portion and a fixed grinder portion that are rotatable relative to each other, and the fixed grinder portion is engagable with the container to permit relative rotation between the cap assembly and the container.

The invention relates to a thermal coal inbound acceptance method for a thermal power enterprise on the basis of a blockchain. The technical scheme of the method is that collected data is packaged toobtain a new blockchain block to serve as the data fingerprint of a current coal inbound process, and the data fingerprint is added into the blockchain of a blockchain system for a subsequent thermalpower enterprise to carry out the query backtracking work of any batch of coal quality control information at any time. A blockchain technology is adopted to store the collected data, the basic structure of the bottom layer of the blockchain is a linear linked list which is formed by connecting "blocks" in series, a subsequent block needs to record the Hash value of a previous block while data isrecorded, and all blocks are combined to form the blockchain. Therefore, the blockchain forms a total account book which is convenient in verification and is unchangeable, a situation that data is maliciously tampered in any node can be identified, and the data can be automatically recovered to a state before tampering through the data of other nodes.

The invention relates to a one-time tamper-proof RFID temperature and humidity recording and transmitting device for cold-chain logistics. The one-time tamper-proof RFID temperature and humidity recording and transmitting device for the cold-chain logistics comprises a CPU, a sensing unit, a storage unit, an opening unit, an open circuit trigger unit, a RFID communication unit and a power supply. The CPU is respectively connected with the sensing unit, the storage unit, the opening unit, the open circuit trigger unit, the RFID communication unit and the power supply. When the opening unit is opened, the CPU controls the sensing unit to begin to gather temperature and humidity information, wherein the temperature and humidity information is stored through the storage unit, the CPU detects and judges whether open circuit signals sent by the open circuit trigger unit are received or not in real time, if the open circuit signals are received, the CPU controls the sensing unit to stop gathering the temperature and humidity information, and meanwhile controls the RFID communication unit to be opened to send previously-gathered temperature and humidity data to an upper computer, and if the open circuit signals are not received, the CPU continues to detect whether the open circuit signals are received or not. Compared with the prior art, the one-time tamper-proof RFID temperature and humidity recording and transmitting device for the cold-chain logistics has the advantages that the temperature and humidity data can be automatically gathered, temperature and humidity data are objective, accurate and tamper-proof, and data gathering safety can be improved.

The invention discloses a method for judging the execution credibility of a shared experiment of a large instrument. The method comprises the following steps: (1) acquiring experiments and related sample data files which can be performed by all current large instruments, and establishing a data sample set; (2) uploading a data recording file obtained by direct connection with the large instrument to a laboratory information management system, and preprocessing the data recording file through an MEC; (3) transmitting the processed data record file to a block chain, and creating a data slice; and (4) a worker obtains the data recording file from the block chain through the secret key, compares the extracted data recording file with the sample data file in the data sample set by using a Simhash algorithm in pattern recognition, and judges the authenticity of experimental data. According to the method, the shared use data condition of the large instrument equipment can be obtained, so that whether the instrument equipment is actually used or not can be better judged. It is directly proved that the predetermined experiment of the shared instrument is real.

The invention relates to the technical field of fund deposit and transaction, in particular to a fund account compliance processing system, which comprises a user side, a bank side, a merchant side and a record deposit side, and is characterized in that a first block chain network is arranged between the user side and the bank side, a second block chain network is arranged between the bank side and the merchant side, a third block chain network is arranged between the bank side and the record deposit side, and the user side and the merchant side are in internet data communication. According to the invention, unified deposit of funds can be achieved, supervision compliance is improved, and safety and stability of user or merchant fund exchange are improved.

The invention discloses a multi-domain optical network security optical tree establishing system and method based on distributed PCE. In a distributed PCE architecture, a trust model, a multicast routing algorithm, a GKMS-DA key management scheme and multiple security mechanisms are fused to ensure stable establishment of a security optical tree. Compared with a typical layered PCE-based protocol,the protocol has better performance in the aspects of network connection blocking rate, multicast tree establishment time and data packet delivery rate in a malicious environment.

The invention discloses a reversible tamper-proof data encryption and decryption method based on encryption and digest algorithms. Main components for the method are as follows: two devices used for data encryption and decryption on a network. According to the method, the discreteness of the MD5 and the reversibility of the DES are combined, so that the safety of an encrypted ciphertext in a network transmission process is increased, and the ciphertext is prevented from being tampered and then transmitted after the ciphertext is tampered in the network transmission process, namely the tamper-proof performance is achieved; and meanwhile, after the ciphertext is received by a correct terminal, the ciphertext is decrypted to obtain plaintext data, namely the reversibility is achieved.

A net settlement assisting device is provided. The net settlement assisting device comprises a display (11), a card information storage section (13) where card information on a card contractor is so stored in advance as to be prevented from being read from outside, an authentication information storage section (15) where authentication information on the contractor is so stored in advance as to prevented from being read from outside, an OTP creation information storage section (17) where OTP creation information is stored in advance as to be prevented from being read from outside, a numeric keypad (12a), authenticating means (14) for authenticating the operator on the basis of the information inputted by means of the numeric keypad (12a) and displaying the card information on the display (11), and OTP creating means (16) for creating a one-time password according to the OTP creation information after the card information is displayed and displaying the one-time password on the display (11).