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nwipe is a Linux computer program used to securely erase data. It is maintained by Martijn van Brummelen and is free software , released under the GNU General Public License 2.0 licence. The program is a fork of the dwipe program that was previously incorporated in the DBAN secure erase disk.
Darik's Boot and Nuke, also known as DBAN / ˈ d iː b æ n /, is a free and open-source project hosted on SourceForge. [2] The program is designed to securely erase a hard disk until its data is permanently removed and no longer recoverable, which is achieved by overwriting the data with pseudorandom numbers generated by Mersenne Twister or ISAAC.
Eraser: Heidi Computers Limited GNU GPL v3: Windows: Yes external [7]? HDDerase: University of California, San Diego: Freeware: OS independent, based on DOS: No internal [8]? hdparm: Mark Lord BSD license: Linux: Yes internal [9] not directly supported without scripting nwipe: Martijn van Brummelen GNU GPL v2: Linux: Yes external Yes Parted_Magic
Eraser securely erases data by overwriting it such that the data is irrecoverable. [1] It supports a variety of data destruction standards, including British HMG IS5 (Infosec Standard 5), American DoD 5220.22-M , and the Gutmann method which features a 35-pass overwrite.
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The Gutmann method is an algorithm for securely erasing the contents of computer hard disk drives, such as files.Devised by Peter Gutmann and Colin Plumb and presented in the paper Secure Deletion of Data from Magnetic and Solid-State Memory in July 1996, it involved writing a series of 35 patterns over the region to be erased.
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Both hdparm and mdtrim find free blocks by allocating a large file on the filesystem and resolving what physical location it was assigned to. Regardless of operating system, the drive can detect when the computer writes all zeros to a block, and de-allocate (trim) that block instead of recording the block of zeros.
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