Interesting article about wiping disks

From: John Aldrich 
------------------------------------------------------
https://www.infosecisland.com/blogview/16130-The-Urban-Legend-of-Multipass-
Hard-Disk-Overwrite.html

Basically, the original claim about "recoverability" was based on RLL and 
MFM drives and is really no longer valid. According to modern researchers, 
just overwriting once with a single, specific character (i.e. "0") should be 
sufficient to "sanitize" the drive. 

=============================================================== From: Stephen Kraus ------------------------------------------------------ I'll stick to DOD level wipes still https://www.infosecisland.com/blogview/16130-The-Urban-Legend-of-Multipass- Hard-Disk-Overwrite.html Basically, the original claim about "recoverability" was based on RLL and MFM drives and is really no longer valid. According to modern researchers, just overwriting once with a single, specific character (i.e. "0") should be sufficient to "sanitize" the drive.

=============================================================== From: Cameron Kilgore ------------------------------------------------------ If its not cleaned to DOD spec demons from hell can use electron microscopes to recover the data! THIS IS ALL A CIA RUSE TO GET YOUR GUARD DOWN! WAKE UP SHEEPLE!!1! --Cameron

=============================================================== From: "Alex Smith (K4RNT)" ------------------------------------------------------ :P On Tue, Aug 30, 2011 at 10:04, Cameron Kilgore wro= te: pes UP : ss- d s, d

=============================================================== From: James Nylen ------------------------------------------------------ Holy crap I want a ketamine dart gun. E s-

=============================================================== From: Dee Holtsclaw ------------------------------------------------------ Just what I was thinking.

=============================================================== From: Eric Wolf ------------------------------------------------------ And I bet you still change your oil every 3,000 miles too? And that thing about tomatoes not being poisonous? Pure government mind control. Just like the moon landing. Never happened, I tell ya! -Eric -=--=---=----=----=---=--=-=--=---=----=---=--=-=- Eric B. Wolf 720-334-7734

=============================================================== From: William Wade ------------------------------------------------------ Oh the moon landing happened. The real question is how many times have we been back? Who knows what all is on the other side of the moon now...

=============================================================== From: wes ------------------------------------------------------ I think they have a documentary about that coming out on the 2nd. -wes

=============================================================== From: Cameron Kilgore ------------------------------------------------------ What's a good open-source disk-killer? I hear one of the Parted live CDs stuffs DBAN with some of its formatting features. --Cameron On Tue, Aug 30, 2011 at 11:18 AM, Jim Wells wrot= e: hen d s 7 -=3D- s- ,

=============================================================== From: "Alex Smith (K4RNT)" ------------------------------------------------------ I swear by DBAN. On Tue, Aug 30, 2011 at 11:22, Cameron Kilgore wro= te: y st it then ld ws 7 g] =3D-=3D- =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 720-334-7734 ss- d s, d

=============================================================== From: Ed King ------------------------------------------------------ I like my pressure washer

=============================================================== From: Sean Brewer ------------------------------------------------------ You could just get the DBAN live CD: http://www.dban.org/download On Tue, Aug 30, 2011 at 11:22 AM, Cameron Kilgore w= rote: ote: y then ld ws 7 =3D-=3D- ss- d s, d

=============================================================== From: Aaron welch ------------------------------------------------------ I prefer 180grain FMJBT .308 out of a Remington 700 300WSM. -AW

=============================================================== From: William Wade ------------------------------------------------------ I am fairly sure that neither of those options follow the open source ideas. Likely proprietary stuff in there.

=============================================================== From: Cameron Kilgore ------------------------------------------------------ Open standards. wrote: wrote:

=============================================================== From: Ed King ------------------------------------------------------ open fire!

=============================================================== From: Aaron welch ------------------------------------------------------ The .308 is the most common caliber in the world. Not much more open source since every country that has an army uses that caliber for IR or LR weapons. -AW

=============================================================== From: "Alex Smith (K4RNT)" ------------------------------------------------------

=============================================================== From: William Wade ------------------------------------------------------ Perhaps, but what about the Remington 700 300WSM? I doubt Remington would give you the blueprints and material specs. Maybe? On Tue, Aug 30, 2011 at 11:53 AM, Aaron welch wrote= : n source ns.

=============================================================== From: Cameron Kilgore ------------------------------------------------------ You just build your own shotgun! --Cameron

=============================================================== From: Aaron welch ------------------------------------------------------ Remington 700 is the most used sniper platform in the US for Law Enforcement and Military use. Parts and specs are readily available online. The 300WSM, like all cartridges, has a full spec for all components available online or in any reloading manual from the major bullet manufacturers. Research bullet tech sometime if when you get bored. I find ballistics entirely too engaging. -AW

=============================================================== From: Average SecurityGuy ------------------------------------------------------ dd if=3D/dev/null of=3D/dev/ On Tue, Aug 30, 2011 at 11:22 AM, Cameron Kilgore w= rote: ote: y then ld ws 7 =3D-=3D- ss- d s, d

=============================================================== From: James Nylen ------------------------------------------------------ /dev/zero * rote: ay y then uld ows 7 =3D-=3D- ass- nd ld

=============================================================== From: William Wade ------------------------------------------------------ Hmm... Open Source Guns. Never thought about that. I guess some of those fancy dancy guns are a bit less so, but as a "I prefer open source ideals in most stuff" kind of guy, I like finding out that there are areas that most would never think about have an open source mentality. On Tue, Aug 30, 2011 at 12:07 PM, Aaron welch wrote= : ent =A0The allistics te: n open : ce

=============================================================== From: Chad Smith ------------------------------------------------------ +Like! Oh crap - I've been on Facebook too long. - Chad W Smith "I like a man who's middle name is W." - President George W. Bush - February 10, 2003 bit.ly/gwb-dubya

=============================================================== From: Chad Smith ------------------------------------------------------ The AK47 - open source before open source http://www.theregister.co.uk/2007/08/03/ak

=============================================================== From: Dan Lyke ------------------------------------------------------ On Tue, 30 Aug 2011 12:11:53 -0400 William Wade wrote: When I first moved to Chattanooga, I met a couple who owned a cafe downtown (they've since moved to Maine or somesuch). He'd worked as a machinist at whatever the facility was that predated Komatsu, and one of the things the union did there after-hours was build a gun a month and raffle it off. I think he said it was usually a semi-auto handgun. And, of course, the thing that makes the AK-47 so popular is that it's easy to build and doesn't require tight tolerances. But, yeah, it's totally possible to build something simple like a bolt action rifle in a home shop. Dan

=============================================================== From: Average SecurityGuy ------------------------------------------------------ doh! s wrote: er any t then ould dows 7 * d =3D-=3D- pass-

=============================================================== From: Dave Brockman ------------------------------------------------------ -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jim, I was hoping you would add to this conversation in particular. I myself have never been able to recover data from an IDE|SCSI|SATA|SAS drive after a *full* disk write has occurred. Doesn't matter if that is an error-checking format (where every sector is zeroed and checked), or one of the utils that write 0|random data to every sector. Just had a filesystem created w/o the error-checking, just deleted a file, sure. After a total write over..... never. Regards, dtb -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk5dWaYACgkQABP1RO+tr2SPIgCfc39UeVxfd/ZROY1cCs2ElxPb of4AnR0wD8UmKyNiXHJ2zmOJqwIqD3Lb =OszP -----END PGP SIGNATURE-----

=============================================================== From: Dave Brockman ------------------------------------------------------ -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 It's not open source, but my drill press works like a champ... Regards, dtb -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk5dWdIACgkQABP1RO+tr2QAVwCfYOOjIoGCvAnLHVxLS5OCWCGm 0GkAnRXKLkVQDqFKs04qyzpiMOXytX5P =2fZ4 -----END PGP SIGNATURE-----

=============================================================== From: "Robert A. Kelly III" ------------------------------------------------------ -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 dd -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk5hrOsACgkQQCTX/7MVrjYhCgCfX8AWoMnQJfO3RVAERoA7XwEK E9MAn2xYXFc09Sdke9bS+6EHEJWganuE =dNVx -----END PGP SIGNATURE-----

=============================================================== From: Billy ------------------------------------------------------ With Flash memory and SSD drives, this even becomes more complicated. Not to mention our SATA and PATA drives with automatic sector remapping, similar to SCSI drives. If an attacker wished to access the reserved area of the drive (using lots of $$ and smart peeps), there could be lots of interesting data to behold - of course, that depends on what the attacker defines as "interesting". I'm not so sure a modern hard drive would take kindly to a massive degauss as from what I understand there is state and/or configuration information stored in reserved areas of the drives as it's easier (economic) to "write" this data to a special area of the drive rather than store it in firmware, or add the circuitry to read from nvram. --b