FAST (Zero Pattern)
Very fast, but least secure.Overwrites all addressable locations of the file with zeros before deleting. The number of passes is chosen by the user (up to 99 passes).
US DOD 5220.22-M (8-306. C)
Speed & security depends on the number of passes & character chosen.Overwrites all addressable locations of the file with a single character before deleting. The character is chosen by the user. The number of passes is chosen by user (up to 99 passes).
GUTMANN METHOD
Slowest, but most secure. Goes far beyond government requirements!The file is overwritten with a special sequence of characters, as designed by Peter Gutmann, before deleting. This is a 35 pass wipe. It is the slowest shredding algorithm but the most secure.
PSEUDO RANDOM DATA
Speed & security depends on number of passes chosen.Overwrites all addressable locations of the file with random characters before deleting. The number of passes is chosen by the user (up to 99 passes).
US DOD 5220.22-M (8-306. E)
A 3 pass wipe. Security depends on initial character chosen.Overwrites all addressable locations with a character, its complement, then a random character before deleting. The initial character is chosen by the user. This is a 3 pass wipe.
Speed vs. Security
Here's a Speed vs. Security comparison for each shredding algorithm used by AceErase...
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