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Saturday, May 17, 2008
Saturday, May 17, 2008
Question of the day
• How can I delete history files in Internet Explorer 6.x?
To delete history files in Internet Explorer 6.x:
Go to Tools and select Internet Options.
Open "General tab", click "Clear history". Click "OK" to delete history files.
Note: If you delete history files manually, you can't delete index.dat file that stores information where you have been online as it is used by Windows all the time.
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Wipe free space : Wipe disk free space
Why you should wipe free space
If you delete files using 'Delete' button, it doesn't really delete files from your hard disk, removable disks, USB-flash drives, memory sticks, flash memory cards, picture cards, etc. This operation just removes the reference to the file but file still exists. Of course it protects your information from accidental deleting. But in this case any unauthorized person may find, recover and use it maliciously.
To protect your privacy you should wipe free space (wipe disk free space) to ensure that previously 'deleted' files cannot be recovered.
How to wipe free disk space
To wipe free space (wipe disk free space):
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Double-click on Delete Files Permanently desktop icon
Click 'Tools' button  in the toolbar.
Select 'Wipe Free Space' item.
Select preferred wiping scheme from the drop-down list.
If you don't remember how this wiping scheme will destruct your files, you can use 'View scheme' button to view all passes.
Select where you want to wipe free space.
Click on 'Wipe Free Space' button.
Wipe Free Space shemes
Using Delete Files Permananely you can use any of the built-in wiping schemes or create you own wiping scheme to wipe disk free space.
- Fast - 1 pass to wipe free disk space
The fastest wiping scheme. If you wipe disk space using 'Fast' scheme your data is overwritten with zeroes.
- British HMG IS5 (Baseline) (1 pass to wipe free space)
If you select British HMG IS5 (Baseline) scheme wipe disk space, your data is overwritten with zeroes with verification.
- Russian GOST P50739-95 - 2 passes to wipe free space
GOST P50739-95 wiping scheme calls for a single pass of zeroes followed by a single pass of random byte.
- British HMG IS5 (Enhanced) - wipe disk free space in 3 passes
British HMG IS5 (Enhanced) is a three pass overwriting algorithm: first pass - with zeroes, second pass - with ones and the last pass with random bytes (last pass is verified).
- US Army AR380-19 - 3 passes to wipe free space
AR380-19 is data wiping scheme specified and published by the U.S. Army. AR380-19 is three pass overwriting algorithm: first pass - with random bytes, second and third passes with certain bytes and with its compliment (with last pass verification) .
- US Department of Defense DoD 5220.22-M - 3 passes to wipe free disk space
Using DoD 5220.22-M you can wipe disk space in 2 passes. DoD 5220.22-M is three pass overwriting algorithm: first pass - with zeroes, second pass - with ones and the last pass with random bytes. With all passes verification.
- the US Department of Defense DoD 5220.22-M (E) - 3 passes to wipe disk free space
DoD 5220.22-M (E) is three pass overwriting algorithm: first pass - with certain bytes, second pass - with its complement and the last pass - with random bytes.
For more security you can use 7-pass algorithms to wipe free space.
- the US Department of Defense DoD 5220.22-M(ECE) (7 passes)
DoD 5220.22-M(ECE) is seven pass overwriting algorithm: first and second passes - with certain bytes and with its compliment, then two passes with random character, then two passes with character and its complement and the last pass - with random character.
- Canadian RCMP TSSIT OPS-II (7 passes)
RCMP TSSIT OPS-II is seven pass overwriting algorithm with three alternating patterns of zeroes and ones and the last pass - with random character (with last pass verification).
- German VSITR (7 passes)
The German standard calls for each sector to be overwritten with three alternating patterns of zeroes and ones and in the last pass with character.
- Bruce Schneier (7 passes)
The Bruce Schneier wiping algorithm has seven passes: first pass - with ones, the second pass - with zeroes and then five times with random characters.
Delete Files Permanently - wipe free space with one click
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