3results about How to "Avoid hijacking" patented technology

The invention discloses a trusted SDN (Software Defined Network) software switch control flow integrity protection method based on ARM (Advanced RISC Machines) CoreSight. A current control flow integrity protection scheme needs to depend on customized hardware or a simulation instruction set, and has the defects of poor deployment compatibility or large performance overhead, and the method utilizes an ARM CoreSight component widely existing in an ARM architecture chip, realizes non-intrusive acquisition of control flow information of a program under the condition of not influencing program operation in a switch, and improves the safety of the switch. Therefore, the integrity of the program control flow is protected. The control function of the ARM CoreSight component is configured to a trusted secure world, so that program control flow information recorded by the CoreSight component is not tampered by programs in an untrusted common world, meanwhile, the recorded control flow information is analyzed in the secure world, a program control flow diagram is rebuilt, and the program control flow diagram is compared with an expected control flow diagram in static analysis, so that the control flow information of the CoreSight component is determined. Therefore, the control flow integrity of the protected program in the software switch is ensured.

The application provides a domain name resolution method and device, electronic equipment and readable medium. The method comprises: obtaining a domain name resolution request initiated by a client for a to-be-resolved domain name; searching for domain name resolution information of the to-be-resolved domain name in a local domain name cache according to the domain name resolution request, wherein the domain name resolution information in the local domain name cache is obtained from an online domain name resolution service according to historical domain name resolution requests; if the domain name resolution information of the to-be-resolved domain name is not found in the local domain name cache, sending the to-be-resolved domain name to the online domain name resolution service to obtain the domain name resolution information of the to-be-resolved domain name from the online domain name resolution service; and sending the domain name resolution information of the to-be-resolved domain name to the client and updating the domain name resolution information of the to-be-resolved domain name in the local domain name cache. The method can avoid the service of the client being unable to be normally used due to the return result of the domain name resolution being empty, prevent domain name hijacking, and improve the stability and availability of the domain name resolution service.

The invention relates to a method and device for reducing extra back-to-source of disk cache content, and belongs to the technical field of information processing.The method comprises the steps that a client side sends a request to an edge node, and when the edge node has cache resources, the cache resources are hit, and data are returned to the client side; big data is analyzed according to the back-to-source log, and detailed information of a client request is collected; after receiving the request, the edge node checks data of the request, if the data is cached, the edge node extracts the data from the cache, and if the data is not cached, the step of cache miss, namely MI SS, is entered; whether logic, request or MI SS is checked at the edge node, and the edge node forwards the request to the upper layer node to obtain the required content; and the edge node returns the data to the client no matter whether the data is cached and hit or is acquired from an original data source through a request. According to the invention, time delay can be effectively reduced, and accurate scheduling is realized.