Deleting pictures on an SD card

In article <45cd52d9$0$28153$4c368faf@roadrunner.com>,
Phil Wheeler <w6tuh-ng7.TakeThisOut@yahoo.com> wrote:

> William Mitchell wrote:
> > Colin_D <nospam.TakeThisOut@127.0.0.1> writes:
> >
> >> Ron, read my post immediately before yours.
> >>
> >> Formatting in camera does NOT erase or delete the images; it only
> >> rewrites the FAT table. The images remain. Computer formatting, as
> >> you say, is somewhat unreliable, but if one does a standard FAT16 or
> >> FAT32 full format it should be ok.
> >
> >Nobody here has been taking
> > pictures of themselves in bed with their wife's sister.
>
> Well--Are you certain about that? <grin>
>

Who told you lot about my wife's sister?

--
Paul Sture

In article <y9dy7n6ofn6.fsf.DeleteThis@hotel.math.ufl.edu>,
William Mitchell <mitchell.DeleteThis@math.ufl.edu> wrote:
>
>Nobody gives a %%%% whether it removes the data from the card.
>Nobody here is working for the CIA. Nobody here has been taking
>pictures of themselves in bed with their wife's sister.

Hey, speak for yourself. Well, technically it's not MY wife's
sister... uhh, honey, you're not reading Usenet are you?
--
There's no such thing as a free lunch, but certain accounting practices can
result in a fully-depreciated one.

On Fri, 9 Feb 2007 09:40:36 -0700
"Just D" <no.TakeThisOut@spam.please> wrote:

> It's much easier to use some special tool rewriting the location
> occupied by these files with some random data. Even ancient Norton
> Tools were able to do that. Or you or anybody of your friend
> programmer can write this tool in coupe minutes using any computer
> language The algorithm is pretty simple - delete all original
> files, create one or many files depending on the maximum file size
> available for this file system, fill this file or files with some
> random info, finally delete this temporary file. Even if this file is
> restored it's worthless.

You are in a dimly-lit room surrounded by humming machines. It is
rather cold. A cypher-locked door is behind you. It is closed.
Before you is a white-board with this incantation scrawled across
it in faintly luminous blue marker:

dd if=/dev/zero of=/dev/sda

An old Unix greybeard steps out from behind one of the machines,
hands you a quarter, and says, "Here, kid. Go buy yourself a real
computer." Intoning "XYZZY", he vanishes.

With apologies to Crowther and Wood.

Paul Allen

Paul Allen wrote:

> On Fri, 9 Feb 2007 09:40:36 -0700
> "Just D" <no.RemoveThis@spam.please> wrote:
>
>> It's much easier to use some special tool rewriting the location
>> occupied by these files with some random data.
....
> dd if=/dev/zero of=/dev/sda
>
> An old Unix greybeard steps out from behind one of the machines,
> hands you a quarter, and says, "Here, kid. Go buy yourself a real
> computer." Intoning "XYZZY", he vanishes

....just after he re-types the magic formula:
dd if=/dev/urandom of=/dev/sda

--
Garry Knight
garryknight.RemoveThis@gmx.net

In article <090220070353386648%kiran@no.email>, Kiran <kiran DeleteThis @no.email>
wrote:

> I wish to delete the pictures on my digital camera's SD card, which is
> almost full. Is it best to do it withe camera controls or computer
> controls? Thank you.

Simple, but not secure: Just toss your pictures into Thrash, and then
select "Empty Thrash" from Finder's Finder menu. This will only delete
the directory entries, the actual files can be recovered (eg with File
Juicer, http://echoone.com/filejuicer/).
Or on the camera select Format card.

Simple and secure: As above, but select "Secure Empty Trash" from
Finder's Finder menu.
This will overwrite the actual data several times by invoking the unix
command srm (for secure remove, resides in /usr/bin/srm on your machine,
read the man page by typing man srm in Terminal if you are curious) -
this has been written for exactly this purpose in the best unix
tradition - solving one problem once and for all. If you want to take a
look at the source code: http://sourceforge.net/projects/srm.
No way to get the pictures back.

HTH

Marc

--
Switzerland/Europe
<http://www.heusser.com>
remove CHEERS and from MERCIAL to get valid e-mail

In article <1171311127.19626.0 RemoveThis @proxy01.news.clara.net>,
Garry Knight <garryknight RemoveThis @gmx.net> wrote:

> ...just after he re-types the magic formula:
> dd if=/dev/urandom of=/dev/sda

Ehm - what is wrong with the spell srm (/usr/bin/srm)?
Made for this purpose. Readily available in Finder too as Secure Empty
Trash.

Marc

--
Switzerland/Europe
<http://www.heusser.com>
remove CHEERS and from MERCIAL to get valid e-mail