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Selling iMac - Securing the disk

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  Selling iMac - Securing the disk Alan Browne <alan.browne@FreelunchVideotron.ca> - 2013-10-15 15:50 -0400
    Re: Selling iMac - Securing the disk billy@MIX.COM - 2013-10-15 22:49 +0000
      Re: Selling iMac - Securing the disk George Kerby <ghost_topper@hotmail.com> - 2013-10-15 18:00 -0500
      Re: Selling iMac - Securing the disk Your Name <YourName@YourISP.com> - 2013-10-16 13:34 +1300
      Re: Selling iMac - Securing the disk Alan Browne <alan.browne@FreelunchVideotron.ca> - 2013-10-17 17:54 -0400
        Re: Selling iMac - Securing the disk JF Mezei <jfmezei.spamnot@vaxination.ca> - 2013-10-17 18:31 -0400
          Re: Selling iMac - Securing the disk Alan Browne <alan.browne@FreelunchVideotron.ca> - 2013-10-17 19:57 -0400
            Re: Selling iMac - Securing the disk dempson@actrix.gen.nz (David Empson) - 2013-10-18 13:03 +1300
              Re: Selling iMac - Securing the disk Alan Browne <alan.browne@FreelunchVideotron.ca> - 2013-10-17 20:51 -0400
            Re: Selling iMac - Securing the disk nospam <nospam@nospam.invalid> - 2013-10-17 20:53 -0400
          Re: Selling iMac - Securing the disk nospam <nospam@nospam.invalid> - 2013-10-17 20:53 -0400
            Re: Selling iMac - Securing the disk JF Mezei <jfmezei.spamnot@vaxination.ca> - 2013-10-18 00:27 -0400
              Re: Selling iMac - Securing the disk nospam <nospam@nospam.invalid> - 2013-10-18 03:09 -0400
        Re: Selling iMac - Securing the disk dempson@actrix.gen.nz (David Empson) - 2013-10-18 12:30 +1300
          Re: Selling iMac - Securing the disk Alan Browne <alan.browne@FreelunchVideotron.ca> - 2013-10-17 20:03 -0400
          Re: Selling iMac - Securing the disk nospam <nospam@nospam.invalid> - 2013-10-17 20:53 -0400
            Re: Selling iMac - Securing the disk dempson@actrix.gen.nz (David Empson) - 2013-10-18 16:01 +1300
              Re: Selling iMac - Securing the disk nospam <nospam@nospam.invalid> - 2013-10-17 23:42 -0400
        Re: Selling iMac - Securing the disk Erik <spam@this.com> - 2013-10-17 17:27 -0700
          Re: Selling iMac - Securing the disk Alan Browne <alan.browne@FreelunchVideotron.ca> - 2013-10-17 20:50 -0400
        Re: Selling iMac - Securing the disk nospam <nospam@nospam.invalid> - 2013-10-17 20:53 -0400
    Re: Selling iMac - Securing the disk Erik <spam@this.com> - 2013-10-15 18:59 -0700
      Re: Selling iMac - Securing the disk jamiekg@wizardling.geek.nz (Jamie Kahn Genet) - 2013-10-16 15:33 +1300
        Re: Selling iMac - Securing the disk George Kerby <ghost_topper@hotmail.com> - 2013-10-18 13:08 -0500
          Re: Selling iMac - Securing the disk Erik <spam@this.com> - 2013-10-18 12:06 -0700
            Re: Selling iMac - Securing the disk Your Name <YourName@YourISP.com> - 2013-10-19 10:17 +1300

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#50143

In article <YcydnfJJIYkKwf3PnZ2dnUVZ_rqdnZ2d@giganews.com>, Alan Browne
<alan.browne@FreelunchVideotron.ca> wrote:

> Even though I 'deleted' all my personal files, when I went to do a clean 
> install with a reformatted drive I could not "erase" it in Disk Utility 
> while it was in FileVault2 status.

you can but it's not obvious. apple specifically checks for filevault
so that people don't accidentally erase a drive that is encrypted.

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#50025

In article <Kradne9qtqI9AcDPnZ2dnUVZ_rqdnZ2d@giganews.com>,
 Alan Browne <alan.browne@FreelunchVideotron.ca> wrote:

> So I'm selling my older iMac.
> 
> Filevault 2 is on.
> 
>     So if I
> 	delete all the files
>     	Remove the account
>     	Turn off filevault2
> 
> Then I assume the files are practically unrecoverable (I'll destroy the 
> recovery key as well, naturally...).

Personally, I always remove and destroy the hard drive/s from my old 
computers... then and only then I'm 100% sure nothing will be recovered.

As a side note, I was in one of those 'thrift' stores with a friend a   
while back... and was amazed to not only see enormous heaps of old 
computers that'd obviously not been taken apart, but overflowing shelves 
and buckets of old hard drives seemingly offered by the pound to any and 
all data miners who might happen by... astounding... gave me the creeps.

Erik

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#50026

Erik <spam@this.com> wrote:

> In article <Kradne9qtqI9AcDPnZ2dnUVZ_rqdnZ2d@giganews.com>,
>  Alan Browne <alan.browne@FreelunchVideotron.ca> wrote:
> 
> > So I'm selling my older iMac.
> > 
> > Filevault 2 is on.
> > 
> >     So if I
> >  delete all the files
> >       Remove the account
> >       Turn off filevault2
> > 
> > Then I assume the files are practically unrecoverable (I'll destroy the
> > recovery key as well, naturally...).
> 
> Personally, I always remove and destroy the hard drive/s from my old 
> computers... then and only then I'm 100% sure nothing will be recovered.
> 
> As a side note, I was in one of those 'thrift' stores with a friend a
> while back... and was amazed to not only see enormous heaps of old 
> computers that'd obviously not been taken apart, but overflowing shelves
> and buckets of old hard drives seemingly offered by the pound to any and
> all data miners who might happen by... astounding... gave me the creeps.
> 
> Erik

It's extremely hard, if not impossible for the average person or even
governments to recover overwritten data off todays super dense HDs, so
physical destruction seems like it's going way overboard (unless the HD
died and there's no way to be sure the data is overwritten), and rather
wasteful, to my thinking :-)

But I doubt many bother to overwrite or zero their data, or the
encryption key. My experience is most users have no idea. Like you I'll
bet the majority of those HDs have some recoverable sensitive data, even
if it's only an email password. But it only takes one little chink in
one's security to be throughly compromised by thieves. I'd also worry
about embarrassing personal information left on HDs, not just stuff like
passwords.
-- 
If you're not part of the solution, you're part of the precipitate.

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#50175

On 10/15/13 9:33 PM, in article
1lauar2.v6zbdw4ks227N%jamiekg@wizardling.geek.nz, "Jamie Kahn Genet"
<jamiekg@wizardling.geek.nz> wrote:

> Erik <spam@this.com> wrote:
> 
>> In article <Kradne9qtqI9AcDPnZ2dnUVZ_rqdnZ2d@giganews.com>,
>>  Alan Browne <alan.browne@FreelunchVideotron.ca> wrote:
>> 
>>> So I'm selling my older iMac.
>>> 
>>> Filevault 2 is on.
>>> 
>>>     So if I
>>>  delete all the files
>>>       Remove the account
>>>       Turn off filevault2
>>> 
>>> Then I assume the files are practically unrecoverable (I'll destroy the
>>> recovery key as well, naturally...).
>> 
>> Personally, I always remove and destroy the hard drive/s from my old
>> computers... then and only then I'm 100% sure nothing will be recovered.
>> 
>> As a side note, I was in one of those 'thrift' stores with a friend a
>> while back... and was amazed to not only see enormous heaps of old
>> computers that'd obviously not been taken apart, but overflowing shelves
>> and buckets of old hard drives seemingly offered by the pound to any and
>> all data miners who might happen by... astounding... gave me the creeps.
>> 
>> Erik
> 
> It's extremely hard, if not impossible for the average person or even
> governments to recover overwritten data off todays super dense HDs, so
> physical destruction seems like it's going way overboard (unless the HD
> died and there's no way to be sure the data is overwritten), and rather
> wasteful, to my thinking :-)
> 

But it is so much FUN to get out the old sledgehammer and do some rhythm
exercises! 

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#50177

In article <CE86E336.A2AA4%ghost_topper@hotmail.com>,
 George Kerby <ghost_topper@hotmail.com> wrote:

> On 10/15/13 9:33 PM, in article
> 1lauar2.v6zbdw4ks227N%jamiekg@wizardling.geek.nz, "Jamie Kahn Genet"
> <jamiekg@wizardling.geek.nz> wrote:
> 
> > Erik <spam@this.com> wrote:
> > 
> >> In article <Kradne9qtqI9AcDPnZ2dnUVZ_rqdnZ2d@giganews.com>,
> >>  Alan Browne <alan.browne@FreelunchVideotron.ca> wrote:
> >> 
> >>> So I'm selling my older iMac.
> >>> 
> >>> Filevault 2 is on.
> >>> 
> >>>     So if I
> >>>  delete all the files
> >>>       Remove the account
> >>>       Turn off filevault2
> >>> 
> >>> Then I assume the files are practically unrecoverable (I'll destroy the
> >>> recovery key as well, naturally...).
> >> 
> >> Personally, I always remove and destroy the hard drive/s from my old
> >> computers... then and only then I'm 100% sure nothing will be recovered.
> >> 
> >> As a side note, I was in one of those 'thrift' stores with a friend a
> >> while back... and was amazed to not only see enormous heaps of old
> >> computers that'd obviously not been taken apart, but overflowing shelves
> >> and buckets of old hard drives seemingly offered by the pound to any and
> >> all data miners who might happen by... astounding... gave me the creeps.
> >> 
> >> Erik
> > 
> > It's extremely hard, if not impossible for the average person or even
> > governments to recover overwritten data off todays super dense HDs, so
> > physical destruction seems like it's going way overboard (unless the HD
> > died and there's no way to be sure the data is overwritten), and rather
> > wasteful, to my thinking :-)
> > 
> 
> But it is so much FUN to get out the old sledgehammer and do some rhythm
> exercises! 

I like to get them open first and harvest the magnets.

Erik

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#50187

In article <spam-591B46.12060918102013@news.dslextreme.com>, Erik
<spam@this.com> wrote:

> In article <CE86E336.A2AA4%ghost_topper@hotmail.com>,
>  George Kerby <ghost_topper@hotmail.com> wrote:
> 
> > On 10/15/13 9:33 PM, in article
> > 1lauar2.v6zbdw4ks227N%jamiekg@wizardling.geek.nz, "Jamie Kahn Genet"
> > <jamiekg@wizardling.geek.nz> wrote:
> > 
> > > Erik <spam@this.com> wrote:
> > > 
> > >> In article <Kradne9qtqI9AcDPnZ2dnUVZ_rqdnZ2d@giganews.com>,
> > >>  Alan Browne <alan.browne@FreelunchVideotron.ca> wrote:
> > >> 
> > >>> So I'm selling my older iMac.
> > >>> 
> > >>> Filevault 2 is on.
> > >>> 
> > >>>     So if I
> > >>>  delete all the files
> > >>>       Remove the account
> > >>>       Turn off filevault2
> > >>> 
> > >>> Then I assume the files are practically unrecoverable (I'll destroy the
> > >>> recovery key as well, naturally...).
> > >> 
> > >> Personally, I always remove and destroy the hard drive/s from my old
> > >> computers... then and only then I'm 100% sure nothing will be recovered.
> > >> 
> > >> As a side note, I was in one of those 'thrift' stores with a friend a
> > >> while back... and was amazed to not only see enormous heaps of old
> > >> computers that'd obviously not been taken apart, but overflowing shelves
> > >> and buckets of old hard drives seemingly offered by the pound to any and
> > >> all data miners who might happen by... astounding... gave me the creeps.
> > > 
> > > It's extremely hard, if not impossible for the average person or even
> > > governments to recover overwritten data off todays super dense HDs, so
> > > physical destruction seems like it's going way overboard (unless the HD
> > > died and there's no way to be sure the data is overwritten), and rather
> > > wasteful, to my thinking :-)
> > 
> > But it is so much FUN to get out the old sledgehammer and do some rhythm
> > exercises! 
> 
> I like to get them open first and harvest the magnets.

I usually open them up and destroy the internals, and put the casing
back together. Of course that's getting more difficult due to Apple
locking down the Mac's components tighter and tighter with each
release.

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