| With the rapid development of network technology,and the constant enlargement of thecomputer network,follow threats and vulnerabilities number are increased in geometricalprogression,especially many factors,such as virus,Trojan horse and the users’ misoperationand so on,so that users’personal data faces great security risk.The users’ personal data is madethe backup by using an advantaged environment within LAN and the free storage resourceson the host, which can ensure that data can be restored after damaged,and it is very importantto greatly reduce the risk of losing the users’ important data.The demands for file backup are carried out the more systematic analysis in the article onthe basis of analyzing the current situation at home and abroad of distributed file backuptechnology.The design and implementation of the file backup and the recovery system aregiven by using the distributed systems and P2P technology.The system can monitorautomatically the users’files that are newly built or modified,and communicate automaticallywith peer-to-peer terminals and manage the information of on-line hosts in network,and makeautomatically file backup and restore files based on users’demands.According to the issues ofthe confidentiality and the security of users’data,the data is encrypted by using the RC4algorithm before sending the data, and the backup files received from other hosts are madewrite protection operation. So the confidentiality and the security of users’data are ensured.The system after realization is tested in the article, including the conventional runningtests and the abnormal condition tests, so the correctness of the system functions is proved,the running of system is stable, the resource cost of the system is reasonable, and it is fit forthe requirements.The system realized in the article is deployed within LAN, which improves the securityof user files, and has a certain reference value for the development of the similar file backupand recovery system. |
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