Design And Implementation Of Secure Blockchain Communication Technology Based On Key Derived Algorithm

In the current era,mobile Internet and communication technologies are developing rapidly and information exchange is becoming more and more convenient.Nowadays,Internet communication has become the first choice for daily communication of people.However,such "zero distance"contact also makes people's sensitive personal information and privacy face many security threats,which is caused by various security problems existing in the imperfect Internet after all.Cryptography algorithms and anonymous communication technology,as the key technologies to ensure the security and privacy of modern communication,have played a vital role in the development of Internet technology.However,the study of simple encryption algorithm can only provide a certain security guarantee at the message level,and it is inevitable to avoid the security threats in transmission.On the other hand,the existing anonymous communication technology is limited by the various characteristics of the existing network technology,and there are security vulnerabilities at many levels,which becomes more difficult to defend against various attacks.Therefore,the research and design of more robust and effective anonymous communication technology models and schemes has become one of the most important tasks and challenges in the field of network security research.Blockchain,as one of the cutting-edge technologies in the current security field,has several characteristics,including decentralization and anonymity and so on,which plays an important role in supporting network security in some occasions.In view of the above research status,this paper,studies and designs a secure communication scheme based on the existing Consortium Blockchain as a platform focusing on the actual needs,combined with principle of cryptography,and gives the implementation of the system.The details of the work include:1)based on ECC cryptography and hierarchical key technology related research,this paper proposes a scheme of key derived and once a secret,which does not require key negotiation and distribution.Then combined with principles of blockchain,we designed an anonymous communication model interacting with blockchain.This model allows users to join the network and communicate only with the initial key of the blockchain node,and information transmission is difficult to track based on the block chain network,which can effectively guarantee communication security and anonymity.2)Relying on the existing Consortium Blockchain in our laboratory,we implement the communication system based on the above model by modules.The system is based on C/S architecture,which makes a trade-off between security and immediacy,and can be used in chatting and file transfer scenarios between people.On the other hand,it weakens the authority of the Consortium Blockchain as a communication server and improves the security problem of overly centralized information forwarding.