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This is the slowest, but the most secure method. Alternate File Shredder will permanently delete files and folders, and the added ability to overwrite the free space on a drive preventing already deleted. The Gutmann algorithm performs the largest number of passes over the data in comparison with other methods. Gutmann algorithm: Overwrites your data according to the encoding mechanism used by the drive.This method is more secure, but slightly slower than the Random overwrite method. DOD (Department of Defense) 5220.22-M algorithm: Overwrites your data with several types of data (0, 1, and random characters) within three passes.This is the simplest and quickest method. Click the text box and type a number of passes (the default number is 1). The number of times AVG overwrites your data is determined by the number you specify. For example, most four-year-olds can destroy a hard drive, but not to Dept. Even then, you have to destroy the media correctly.
#Erase files shredder free full
The reason we say practical is that to ensure any data is 100 deleted calls for physically destroying media. Free Space (that may contain all or remnants of normally deleted files) can be shredded to ensure full of partial file recovery from this space is prevented. Random overwrite (selected by default): Overwrites your data with random patterns. A practical approach is to use a free file shredder program called Eraser.You can choose between 3 algorithms that differ according to speed and level of protection:
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