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582 results about "Check point" patented technology

Trusted computing platform and method for verifying trusted chain transfer

InactiveCN101901319ASolve the trust decay problemGuaranteed Metric Efficiency IssuesPlatform integrity maintainanceCheck pointValidation methods
The invention relates to a trusted computer platform and a method for verifying trusted chain transfer. A trusted chain is a key component of a trusted computer system, and ensures the safety and credibility of the computer system in the integral process from a trusted source to system starting, but the conventional trusted transfer mode is a chained transfer mode, and due to the problem of layer-by-layer attenuation of the trust level of chained transfer, potential safety hazards exist in the process of establishing the trusted chain of the trusted computer platform. A CPU is authorized by a trusted platform control module (TPCM) to perform chained measurement on the trusted computer platform, and simultaneously, the TPCM follows the CPU to perform the real-time, random and partitioned measurement on the trusted chain, and check points are embedded into codes of each part of the platform trusted chain to perform statistics and comparison on total operating time and total expected time and the operating time and expected time of each partition so as to judge whether each trusted node is distorted or not. The trusted computer platform and the method for verifying the trusted chain transfer improve the real-time of establishment and checking of the trusted chain, and particularly can protect against TOUTOC attack.
Owner:BEIJING UNIV OF TECH

Automatic recovery method for blockchain consensus node

ActiveCN107423152AImprove usabilityAccelerate the speed of participation in consensusPayment protocolsNon-redundant fault processingByzantine fault toleranceCheck point
The invention discloses an automatic recovery method for a blockchain consensus node. The method comprises the following steps that: 1) after crash, a reconnection node broadcasts an initial recovery message and obtains the check point information and the block height of other nodes; 2) the reconnection node receives the reply information of other nodes and counts the check point and the block height of a sender; 3) a target node is found, and the check point information, the block height and the block Hash of the target node are obtained; 4) the reconnection node carries out state transition and is recovered to the check point height of the target node; 5) the reconnection node asks for the message of PQC (Process Quality Control) from the target node; and 6) the reconnection node receives the PQC information returned from the target node, carries out normal consensus processing and repeatedly executes S5) and 6) until the height of the reconnection node block is recovered to normal node height. By use of the method, the problem that crash node reconnection is slow in a traditional PDFT (Practical Byzantine Fault Tolerance) consensus process is solved, and a quick reconnection method for the crash reconnection node on the blockchain is put forward.
Owner:HANGZHOU QULIAN TECH CO LTD

Compact integrated redundancy controller and control method thereof

ActiveCN101271332ASolve the hidden dangers that are prone to single point failureSolve the hidden danger of single point of failureSafety arrangmentsTotal factory controlCheck pointTransceiver
The invention provides a compact integrated redundancy controller and a controlling method thereof. The controller is provided with two controllers which have identical structure and can be used alternatively by displacing. Each controller is provided with a storage chip, a flash memory chip, a firmware chip and a programmable apparatus which are respectively connected with a main control chip; the controller is also provided with a first serial port transceiver, a second serial port transceiver, a PCI bridge piece and a network card controller. The serial port transceivers are connected with a CPCI connector by a RS422 serial port; the network card controller is connected with the CPCI connector by an Ethernet port; the PCI bridge piece is connected with the CPCI connector by a CPCI bus; the serial port transceivers are also connected with a maintenance serial port; a programmable apparatus PLD is also connected with the CPCI connector by a HA control signal. The methods comprise the starting method of main/standby controllers, the method that a standby controller is upgraded into a main controller automatically and a check point protocol control method when the main controller and the standby controller are switched in a system. The controller and the method can upgrade the system controller of a traditional CPCI system into a double-redundancy standby system, which solves the hidden trouble that single-point failure can easily occur in a CPCI system controller.
Owner:BEIJING FOUNTAIN MICROSYST
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