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The article considered crucial issues of providing confidentiality of some important information and basic troubleshooting related to confidential files that every user can experience. Nowadays the main tool for providing security of confidential data (e.g. e-mail, electronic documentation, data bases, etc.) is file encryption. A file may be encrypted by means of built-in utilities of applications or using special software. The file can be also hidden by renaming. Another way is to hide the file by nesting it in another file of a quite large size (usually audio or graphics one). The selection of a security tool is based on the required level of information security: the higher data confidentiality is, the more advanced software should be used.
When dealing with encrypted files the users may face a lot of troubles and difficulties. First of all, these problems arise if a user forgets file identification data, i.e. file name, location and password, in other words, the important information is lost together with the file (i.e. its name and location), and then it's necessary to search the lost file, or the file is unreadable without forgotten or lost password, and then to decrypt the data there is need to recover the password.
Furthermore, the issues related to search of files hidden by means of stenography were also taken into consideration. The easiest way to hide a file is to rename it (i.e. to change its extension). In this case to find the file (i.e. to find out an application which this file is really related to) it's necessary to analyze file structure. The more complex task is to find out the file that has been hidden by means of special stenography software, i.e. nested in another file. Then there is need to use special software programs for detecting stenography (the most effective approach). You can also try to find out the nested data without special software, but it's very hard to realize, at least, you need an original file (audio or graphics one) without changes to compare with.
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