On 10/26/2016 12:46 PM, maritnez wrote:
you have a file that contains sensitive banking data and would like to delete
it without leaving any traces on your system.
you can 'move it to trash'
which moves it to the trash
you can then press the delete button in your trash container but
is this really securely deleting the file without any chance of recovering it?
how to delete files without leaving ANY trace from it?
I think the surest non-physical method is to make sure the data is
encrypted in the first place, and throw away the key/passphrase. On a
typical Qubes configuration, this would mean re-encrypting and
reinstalling the OS if your data was on the same LUKS volume as the OS.
FWIW, Qubes supports SSD TRIM by default. This might provide a certain
level of data erasure if you are using an SSD, leaving less data behind
*on average*. However, its not something you should rely on when
deleting specific files. Some SSDs and HDDs also have a "secure erase"
feature which erases the entire drive.
Chris
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