142 results about "Dependable computing" patented technology

System, method, computer, and computer program for secure data processing of potentially malicious code and documents or other data that may contain malicious code. System, method, computer for a secure and reliable computing environment to protect against data loss and/or corruption to provide secure and reliable data processing.

The invention provides a trusted computer system for protecting BIOS and the application method thereof, belonging to the field of information security. The invention is characterized in the physical connective way of a trusted computing module and a BOOT ROM, wherein the trusted computing module is connected to a system mainboard, and the BOOT ROM is connected to the trusted computing module by a communication bus. The trusted computing module comprises a DMA controller, a FIFO unit and a security isolation unit; the DMA controller is used for reading BIOS code to the FIFO unit of the trusted computing module or reading the BIOS code from the FIFO unit to the I/O bus of the trusted computing module; the FIFO unit is used for temporally storing BIOS code to be processed; the security isolation unit is used for preventing vicious procedures outside the trusted computing module from reading confidential information in memory cell inside the trusted computing module. The read/write and update of BIOS code need the identity authentication and password authentication of a current user, ensuring the security of BIOS key code; the equipment access control is realized by hardware method, reaching the effect of active control of mainboard peripheral equipment.

The invention discloses a dynamic measuring method based on dependable computing and a management system. The management system interacts with a user through a user management interface of an operation system and application programs. The management system comprises a dynamic measurement control module interacting with the operation system, wherein the dynamic measurement control module controls a judgment module, an audit module and a measuring module, the judgment module obtains a latest measurement result from the audit module and judges whether the operation system is dependable or not according to a strategy, the measuring module is responsible for detecting the dependable state of the operation system in operation, the audit module is responsible for calculating, storing and reporting measurement results in a classified mode, the control module is responsible for configuring external management programs to other modules, sending system state information to the external management programs and providing access ports of trusted software special hardware for the modules. The management system works in a kernel layer, the system can guarantee integrity of the modules once starting static measurement, and credibility and safety are improved.

A highly-reliable computer apparatus and path management method capable of reducing the impact of a failure in a physical I/O device on the entire virtual computer system is suggested.

If a first path management unit detects a failure in a virtual HBA, it notifies a second path management unit of the failure; and in response to the failure notice, the second path management unit gives an instruction to the first path management unit corresponding to each virtual computer having another virtual HBA that uses a physical HBA corresponding to the virtual HBA in which the failure has been detected, to block the other virtual HBA; and if the first path management unit receives the instruction from the second path management unit to block the virtual HBA, it blocks the designated virtual HBA.

A pair of distance measurement sensors provided at different heights measures distances to an obstruction. When the measured distances are shorter than a threshold distance, the height of the vehicle is found based on the measured distances. When the height of the vehicle is found greater than a threshold height, the existence of the obstruction is reported to the driver. When the height of the vehicle is found smaller than the threshold height, on the other hand, a change in obstruction height is found and compared with a threshold. When the change in obstruction height is greater than the threshold, the existence of the obstruction is reported to the driver since the height is determined to be an unreliable result of computation.

A trust evaluation system based on privacy protection and a construction method thereof relate to the field of dependable computing in information safety. The system comprises a service node, a trust evaluation proxy node and a user node. The trust evaluation proxy node dynamically deploys a trust evaluation method to measure the trust relationship between the user node and the service node. The user node and the trust evaluation proxy node transmit and receive information mutually and evaluate the service node. The system and its construction method aim to objectively, accurately and justly quantify the trust relationship between the user node and the service node, effectively inhibit malicious acts such as conspired fraud, malevolent recommendation and the like, raise interactive success rate of the user node and the service node and meet requirements of user node individuation to the maximum.

The invention provides a method for realizing dependable SSH based on dependable computing. The method integrates remote authentication of the dependable computing with key exchange of an SSH protocol so as to closely combine platform status information verification with session key negotiation; and the method enhances the security of data at a communication end point on the premise that safe transmission of the data is ensured. The method requires that both a server and a client are provided with dependable security chips; and the platform status can be measured by a measurement module and a dependable operating system. The method can not only effectively prevent the security threat that the communication with an unknown end point by using a security channel may undergo various attacks in the SSH protocol, but also effectively protect against replay attack, impersonation attack and man-in-the-middle attack.

An inexpensive storage system is disclosed along with methods of managing such a system. In one preferred embodiment, the system includes a high performance high reliability storage medium configured for initial storage of data, a low performance high reliability storage medium configured for backup of data initially stored on the high performance high reliability storage medium, and a high performance low reliability storage medium, configured to receive data transferred from the high performance high reliability storage medium, after the data has been backed up on the low performance high reliability storage medium. This significantly reduces the cost of the system without substantially comprising performance. Reliability is likewise maintained owing to the high reliability backup.

The invention discloses an operation system security bootstrap device, which includes a base input and output system, a central processing unit and a hard disk. The central processing unit is connected with the base input and output system and the hard disk; a bootstrap program is stored in the hard disk to realize the bootstrap to an operation system. Particularly, the bootstrap device further includes a dependable computing cryptographic module which is connected with the central processing unit. The central processing unit controls the dependable computing cryptographic module to verify the legality of an operator and detect the completeness of the bootstrap program, and backups the bootstrap program to realize the restorability of the bootstrap program. The invention further provides a security bootstrap method utilizing the device. Before the operation system is started, the identity of the operator is subjected to legality verification, so as to ensure that the operator is authorized legally; the hard disk bootstrap program is subjected to completeness detection, so as to ensure that the bootstrap program to be not maliciously interpolated; and the backup and restoring mechanism of the bootstrap program can continue the correct bootstrap to the operation system under the condition that the bootstrap program is interpolated.

The embodiment of the invention discloses an access control method and device. The access control method and device are used for reinforcing protection over data concealed under a hardware protection mechanism of a dependable computing platform and preventing violent cracking by a malicious application program. The method comprises the steps that a container is established for the running application program, then whether the application program is a dependable security application program or not is judged, and if the circumstance that the application program is the dependable security application program cannot be confirmed, the access permission of a safety access interface is not released for the container.

The invention relates to a key encrypting and storing method based on a tree structure, which belongs to the technical field of dependable computing. A binary tree layering and encrypting technology is adopted to convert the protection for many data encrypting keys into the protection for a main key and comprises four parts of binary tree initialization, data encrypting key insertion, deletion and reading. A root node of a binary tree represents the main key and is stored in a dependable crypto module, and keys represented by other nodes are stored in an external memory, wherein a leaf node represents the data encrypting keys, and when a non-root node is stored, a father node of an upper layer is always used for encrypting the non-root node, thus when used, the data encrypting keys must be reduced. The method saves the memory space of the dependable crypto module, can store large numbers of keys and can be widely applied to a computer information system of a high safety class.

The invention provides a dependable computing based process control method. The process control method includes that a system is powered and a BIOS (basic input/output system) is started; the BIOS drives an operating system bootstrap program to start; the bootstrap program drives an integrity measurement module in an inner nuclear layer to start; the integrity measurement module drives a process control module in an operating system layer to start; the process control module is used for judging ordinary files, critical files and dynamic resources in process; the process control module and the integrity measurement module are used for controlling the ordinary files, the critical files and the dynamic resources to realize protection of the program. By the method, the files related to process operation are subjected to protection based on the dependable computing platform hardware algorithm, static files and the dynamic files are protected, permission of accessed files and mapping relation label pages are defended, and protective means are stereo and include the aspects of direct encryption storage, and inputting credibility quantity into a dependable computing platform register and the like, so that the process can be effectively controlled.

The invention designs an unmanned aerial vehicle path planning method for providing a low-delay and high-reliability calculation service for a dynamic user under a mobile edge calculation architecturebased on deep reinforcement learning. Considering that the unmanned aerial vehicle has a convenient infrastructure, a communication channel can be quickly built in a remote or disaster area, and computing resources can also be erected to provide services for a terminal mobile user, the unmanned aerial vehicle is considered to serve as a mobile computing server, and efficient interaction servicesare provided for the terminal mobile user above the terminal mobile user. According to the invention, the real-time movement of the terminal user is considered; the method comprises the following steps: establishing a Gaussian-Markov mobile model by modeling, establishing a user position state, an unmanned aerial vehicle position state, an unmanned aerial vehicle battery capacity state and a channel state between an unmanned aerial vehicle and a user, and planning an unmanned aerial vehicle path by combining a deep reinforcement learning algorithm to maximize the long-term benefit of the system.

The invention discloses a platform integrity verification method. The method includes the specific steps that the integrity of a dependable computing platform is reported by the dependable computing platform, and a verifier finishes the verification process after a verifier platform receives the relevant information. Compared with the prior art, according to the platform integrity verification method, a safe dependable encryption chip is adopted, the platform can provide an integrity report for an external entity, a receiver judges the credibility of the platform according to the reported metric, the practicability is high, and the safety, integrity and effectiveness of the platform are guaranteed effectively.

The invention provides a method for calculating temperature, pressure and dryness of an injected steam and nitrogen mixture. The method comprises the steps as follows: calculating initial temperature, initial gaseous dryness and initial steam dryness of a mixture after steam is mixed with nitrogen; calculating wellhead temperature, wellhead pressure and wellhead dryness distribution of a surface pipeline wellhead with randomly set step length by using the outlet of a steam boiler as an initial calculating point; calculating wellbore temperature, wellbore pressure and wellbore dryness distribution with randomly set step length by using the wellhead as an initial calculating point; and providing guidance for the implementation of the corresponding technology in an oil field site based on the wellbore temperature, the wellbore pressure and the wellbore dryness distribution. The method of the invention has excellent computational stability and higher computational accuracy, and provides reliable calculation means for optimal design of wellbore injecting parameters of a stream and nitrogen mixed system.

The present invention relates to an authentication system and a method based on dependable computing. The authentication system based on dependable computing comprises a dependable terminal, a dependable certificate server, and a dependable authentication server. Each of the dependable terminal, the dependable certificate server and the dependable authentication server has a dependable computing module. According to the authentication system and the method based on dependable computing provided by the invention, PKI digital certificate technology and a dependable computing platform are combined, the security of a network and a server terminal is ensured, at the same time, terminal can be ensured to be dependable, the security of a whole network is raised greatly, and creditability and security of computer network certification are raised.

The invention discloses a vehicle big data computing and unloading method based on a fog computing network. According to the invention, a more efficient and reliable computing environment can be provided for analyzing vehicle big data. Firstly, a fog computing network system architecture is provided, a network delay model is further established, then a task generation model is established, a fog computing resource optimization model is established, and finally a load balancing computing resource effective task unloading algorithm is used. Efficient Task Offloading Algorithm with Load Balancing, CRETOA) is used for managing computing resources for load balancing of the fog computing network, and a road vehicle terminal request computing task is allocated to the optimal fog computing resources.

The method comprises: a server side for providing data update, a client side comprising a dependable computing module and a dependable computing module are provided; using the code of the dependable computing module as the secret information shared by the update provider and the dependable computing, by which the mutual authentication mechanism and encryption communication are established between the server side and client side in order to download the update data to client side; the secret communication also be set between the client side and TPM, and when the TPM conforms the correction of update data from the client side, it make update.

A calculation method of outburst discharge of a large granular weir and a plug dam under the impact of outburst viscous debris flow is disclosed. Through analysis of the static equilibrium relationship of large particles in a weir-plug dam under the impact of viscous debris flow, the formulas for calculating the critical mud depth of debris flow and the maximum particle diameter in weir-plug dam are derived, then the calculation model of weir plug dam outburst discharge and maximum particle diameter is established by using the calculation formula of weir plug dam outburst discharge, and the reliability of the model is verified by an example, and thus an accurate and reliable calculation method is provided for determining the outburst discharge in debris flow prevention and control engineering.

The invention discloses a method for predicting an optimal release point of an airdropped material. The method comprises: performing calculation by regarding a parachute as a three-dimensional 6-degree-of-freedom variable mass body, analyzing a motion characteristic of the airdropped material in a parachute opening and stable descent process according to an actual parachute descent working procedure, establishing a reliable dynamic model of a goods and materials airdropping process, simulating a motion track of the airdropped material after leaving from an aircraft, and calculating a parachute descent trajectory; and calculating and analyzing optimal release point, release time and release angle of the airdropped material with a Monte Carlo method according to a known target release point. With the method, the parachute descent airdropping process is subjected to high-precision dynamic modeling and solving, so that an airdropping point in a specified airdropping condition can be calculated reliably and a theoretical reference is provided for accurately mastering a release opportunity in a parachute descent implementation process to enable goods and materials to land in a predetermined landing site.

The invention discloses a method for calculating the damage effect of the target of a conventional facility, belonging to the field of the technology for assessing and calculating the damage effect of the target of the conventional facility. The method for calculating the damage effect of the target of a conventional facility comprises the following steps: dividing the target into various types of sub-targets on various layers according to the combat task and the characteristic of the target; constructing the judgment matrix of a hierarchical structure model from top to bottom with the improved analytic hierarchy process; calculating the weight of the same type of sub-targets on the same layer relative to the sub-targets on the upper layer; calculating the damage effect of the sub-targets on the bottommost layer by a Bayesian network decision-making model; and calculating the whole damage effect of the target with the comprehensive assessment method. The method can be used for rapidly and reliably calculating the damage effect of the complex target and the target in the real wartime though less or no more accurate damage information is available.