Re: FileCopy overwrites the existing file

anton bassov wrote:
The most naive believe here is that "the old data disappears for good"
in case of overwriting the same sectors.

Why is it naive???? There is a speculation that *THEORETICALLY* it may
be possible to retrieve overwritten data with microscope, but this is
just a speculation - no one has *EVER* demonstrated that it can get
done in practice. Just to give you an idea, ovewriting data 3 times
(once with all 0s, once with all1s and once with a random sequence) is
the technique, approved by US Department of Defence for destroying *
CLASSIFIED* data.....

Hah, why so many question marks? There are many standards of destroying classified data, each country has it's own, but if you refer US Department of Defence they, depends on how documents are classified recommends up to 7 times rewriting with random data (if I remember well).

Recovering overwritten data is NOT a speculation, it can be done and any good software recovering company will do it without problems if the data was overwritten only once (we're talking about magnetic data storage disk here). Upon what your claims that "no one has *EVER* demonstrated that" are based?



--
Grzegorz Wróbel
http://www.4neurons.com/
677265676F727940346E6575726F6E732E636F6D
.

Loading