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INTRUCDUTION
Unauthorised access to the information on your computer or portable storage devices can be carried out remotely, if the 'intruder' is able to read or modify your data over the Internet; or physically, if he manages to get hold of your hardware. You can protect yourself against either type of threat by improving the physical and network security of your data, as discussed in How to protect your computer from malware and hackers and How to protect your information from physical threats. It is always best to have several layers of defence, however, which is why you should also protect the files themselves. That way, your sensitive information is likely to remain safe even if your other security efforts prove inadequate.
There are two general approaches to the challenge of securing your data in this way. You can encrypt your files, making them unreadable to anyone but you, or you can hide them in the hope that an intruder will be unable to find your sensitive information..
ENCRYPTING YOUR INFORMATION
Storing confidential data can be a risk for you and for the people you work with. Encryption reduces this risk but does not eliminate it. The first step to protecting sensitive information is to reduce how much of it you keep around. Unless you have a good reason to store a particular file, or a particular category of information within a file, you should simply delete it (see How to destroy sensitive information for more information about how to do this securely).
Encrypting your information is a bit like keeping it in a locked safe. Only those who have a key or know the lock's combination (an encryption key or password, in this case) can access it. The analogy is particularly appropriate for TrueCrypt and tools like it, which create secure containers called 'encrypted volumes' rather than simply protecting one file at a time. You can put a large number of files into an encrypted volume, but these tools will not protect anything that is stored elsewhere on your computer or USB memory stick.
FILE SYSTEM FILTER DRIVER
A file system filter driver can intercept requests targeted at a file system or another file system filter driver. By intercepting the request before it reaches its intended target, the filter driver can extend or replace functionality provided by the original target of the request. With the filter driver you can monitor or control the file system activities on the fly. You can intercept the file open/create/replace, read/write, query/set file attribute/size/time security information, rename/delete, directory browsing and file close requests.
EASEFILTER FILE SYSTEM CONTROL FILTER DRIVER
EaseFilter file system control filter can control the file activities, which you can intercept the file system call, modify its content before or after the request goes down to the file system, allow/deny/cancel its execution based on the filter rule. You can fully control file open/create/overwrite, read/write, query/set file attribute/size/time security information, rename/delete, directory browsing these Io requests.
EASEFILTER FILE SYSTEM ENCRYPTION FILTER DRIVER
EaseFilter File system encryption filter driver SDK provides a comprehensive solution for transparent file level encryption. It allows developers to create transparent encryption products which it can encrypt or decrypt files on-the-fly, it can allow only authorized users or processes can access the encrypted files.
Supported strong cryptographic algorithm Rijndael is a high security algorithm which was chosen by the National Institute of Standards and Technology (NIST) as the new Advanced Encryption Standard (AES), it can support key length 128-bits,192-bits and 256-bits.