Research and Application of the Transparent Data Encpryption in Intranet Data Leakage Prevention

Traditional data leakage prevention strategies encompass access control, audit logon and authority management. They have some effects on preventing sensitive information from leakage, while the system´ s availability may be degraded seriously by their limitation. To solve this problem, a novel model based on Windows file system filter driver is proposed in this paper, in which system encrypts files automatically according to encryption strategies. Leaking confidential information out of enterprise environment, intentionally or unintentionally, will be prevented effectively. Moreover, it has the characteristic of mandatory and transparent encryption, which can compromise the contradiction between data security and user flexibility.