File deletion method speed vs. security

davidstone

New Member
Which file deletion method provides the best compromise between speed and security?

e.g. will DoD short (which has 3 passes) take as long as PRNG Stream with 3 passes, or will they take different amounts of time each?

And which of these two will be more secure?
 

garrett01

Administrator
Staff member
DOD might be faster as PRNG has to get the random bytes each time. The difference should be almost nothing in real terms.
 

davidstone

New Member
garrett01 said:
DOD might be faster as PRNG has to get the random bytes each time. The difference should be almost nothing in real terms.
Okay, so time is roughly the same, what about security?

Which one will be harder to recover, DoD short or PRNG 3 passes?
 

garrett01

Administrator
Staff member
On a modern drive one pass erase will be just as good as the other methods:

Recovery possibilities are based on:
- Damaged drive so it cannot be erased in the first place
- SSD drive where the data can be written to a different place each time - here a full wipe should work but individual file wipes are not guaranteed.
 
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