| With the high-speed development of mobile communication, countries have begun to study the fifth generation(5G) mobile communication technology,but research on security technology is lack. 5G network security system puts forward higher requirements for safety, you must provide a higher and more levels of security mechanisms and more diversified network security solutions.Based on the prototype of Ad Hoc network, This article introduced the theory of safety cross-layer cooperative security technology. Through in-depth analysis of the characteristics of the Ad Hoc network and security problems, I have expounded the necessity of the cross layer design of Ad Hoc network, Through the existing cross layer design scheme on the basis of Ad Hoc network, I have studied the current security threats and vulnerabilities in the physical layer, link layer, network layer, application layer. To solve these problems, I have designed a cross-layer collaborative protection mechanism.First of all, we will calculate the node capacity, build perfect secret passage, and use the adaptive key exchange scheme of the physical layer to complete the physical key generation and exchange security; Secondly,according to the physical key generation efficiency is low, the characteristics of the bit error rate is high, I have designed the cross-layer efficient system key generator, the application of self synchronous sequence cipher technology to expand the physical key derivative, implement the usage of keys cross layer; Finally, I have used the key sequence to strengthen the security of all kinds of network communication protocols to Defense various attack methods of network protocol.Through the cross layer design, this paper solves the key management system and the key technical problems of communications security, etc, realized the bottom-up system together with the security protection, constructed the cross-layer cooperative security defense system of Ad Hoc network. |
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