Research on file protection based on computation elasticity

File protection plays more and more important role in modern information secrecy and security. Aiming at the problem of security threats that faced by files, the existing file protection technologies were analyzed and file protection scheme based on computation elasticity was brought out. Except for the basic file operation function of file system, the scheme can achieve the elastic function of file system through distributed storage and survival inspection. The scheme provided in the paper can not only ensure the confidentiality, integrity and controllability of file in the system, but also dynamically backup file when faced with information attack, so that the uninterrupted service of documents can be provided.