secure delete

A question about Shredding files using Python

Forums: 

I'm running on Windows Vista...

I've just started using BleachBit and so far I'm very impressed. There were two requirements I had when searching for such a tool: the first was the ability to securely shred files and the other was the ability to add my own folders, files and registry entries to the built-in ones. CleanerML is excellent for defining my own cleaners and is far superior to what I'd previously been using in CyberScrub, which I stopped using some time ago due to my dissatisfaction with several product updates.

Is BleachBit's one pass overwrite good enough?

Forums: 

Further to the earlier discussion about BleachBit's one pass overwrite
functions and whether BleachBit should use more than one pass for it's over wrting pattern:
http://bleachbit.sourceforge.net/forum/bbs-simple-overwrite-not-explaine...

"Studies have shown that most of today’s
media can be effectively cleared by
one overwrite." ?

BB's simple overwrite is not explained anywhere, why? Why no standardised erasing patterns, to ensure truer Data Sanitization:

Forums: 

Can anyone explain what happens why I enable he overwrite function with BB, how does it ensure the data cannot be recovered if I overwrite a file on a hard disk or usb stick?

I do think BB is a great solution for Linux, but how can I trust a functin that just says overwrite with no explanation of what is meant by this term, from a technical stance.

Under BB's preferences options why not enable users to choose standard secure erasing patterns like:

Gutmann method
http://en.wikipedia.org/wiki/Gutmann_method

AFSSI-5020
http://en.wikipedia.org/wiki/AFSSI-5020

DoD 5220.22-M

How many passes for the "free disk space" option?

Forums: 

Hi

How many passes Bleachbit does when you select the "free disk space" option ? 35 passes ? For example Ccleaner with the Gutmann option doeas 35 passes.
Is it as efficient as eraser for windows ? Or "secure-delete" for linux with the command : sudo sfill -v / ?

Regards

Sam

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