Comments on: Microsoft: BitLocker key to safe disk disposal

Says businesses using Vista with its hard drive encryption technology will have easy, safe way to dispose hard disks.

Sound secure until...

The board or power supply go awry and the TPM chip goes away with them. "That's ok, throw the machine away, nobody will be able to read your hard drive..." someone will say "... even the guy that has to recover the data from that machine because someone forgot to make a backup...?!" while hitting the wall. Whoops!

And that's the catch: how many users will implement that basic and simple security feature of perform backups? Not many, but it will be "fun" to see if they will learn it finally.

Sound secure until...

The board or power supply go awry and the TPM chip goes away with them. "That's ok, throw the machine away, nobody will be able to read your hard drive..." someone will say "... even the guy that has to recover the data from that machine because someone forgot to make a backup...?!" while hitting the wall. Whoops!

And that's the catch: how many users will implement that basic and simple security feature of perform backups? Not many, but it will be "fun" to see if they will learn it finally.

[richto]

Thats not any different

Thats not any different from the hard disk failing or someone stealing the PC. There are already plenty of ways to loose your data if you don't take backups.

[Seething Ganglia]

The real goal: unswappable disks

The real goal here is to make it impossible to swap hard disks (along with the installed OS and applications) between computers.

Safe disposal is just a Red Herring.

[richto]

You already have that.

Windows licensing and product activation already prevents you doing that so no change there.

[scoobbs]

Userlocker

Is there still anyone who believes a single word said by anyone working or owning microsoftwarez???
This thing looks more like some ´userlocker´ to me. Once someone uses it, he´ll feel locked.
Forever.

[unknown unknown]

AES being broken by the government

That rather unlikely baring either major advances in cryptoanalysis or some very very fast computers.

If you include weak keys a 128 bit key has 2^128 - 1 or 340,282,366,920,938,463,463,374,607,431,768,211,455 possible keys. It's likely the TPM uses cryptographicly strong keys so brute forcing is out of the question.

[richto]

Mayber not AES but the TPM can probably be broken

Quite likely a government would have the resources to simply decap the TPM chip and read the key though. Plenty of commercial companies can do that if you can afford it.

[Zymurgist]

This is intentionally misleading...

TPM isn't going to ensure that it's safe to dispose of a drive, and it may even complicate things by making it difficult to take more proactive measures to eliminate the information (TPM failure would prohibit erasing the information).

The most effective way of making it safe to dispose of a hard disk is still a properly applied 10lb sledgehammer.

If you want to reuse a disk, writing over every sector with random information a hundred times is a pretty effective measure and considerably more secure on relying encryption to protect it. The fact of the matter is that encryption is just enhanced obfuscation -- all the data is still present, just difficult to access. With age, encryption techniques become less effective as attacks against them become more advanced and compute resources for breaking them are cheaper and more powerful. Relying on TPM to make it safe to dispose of a drive is like relying on a post it with "do not enter" on it to keep people out of your house while away on vacation.

[Pop4]

Data recovery for redundant HDD's ; for the greater good.

Dunt-dunt dunt-du Du! Remember when we only had five seconds to un-plug or throw the switch into an off position during a lan-minig experience online?

Well, today's SSL/SQL environment could shed the maturity of substantiating such a need as locking data; seperate from the opeating system's EFI or boot registry. depending on the level of security your IT Supervisor has on the table.

[qazwiz]

Good Observation

and last time I checked there wasn't any hardware that didn't allow a hard drive to be reformatted. That is the reason we have these phrases:

Please confirm: do you wish to delete all dataa?

reformating the disk will lose all information currently stored. this is not reversable.

and

Are you sure?

[ksteadman]

100% Secure or Breakable?

Nick McGrath, head of platform strategy for Microsoft UK says, "The technology itself is 100 percent secure--we will not be producing any backdoors. There are no backdoors in Bitlocker technology."

Microsoft Technical Security Advisor Steve Lamb says, "You can always break an encryption algorithm if you throw enough horsepower at it."

Does anyone see something wrong here?

"You can do an awful lot with PGP. You can encrypt things in a way that governments would find difficult to decrypt," said Mark Sunner, MessageLabs' chief technical officer.

PGP has it's source code available for peer review. If big brother or anyone else was able to break it, we would all hear about it.

Kristopher Steadman
PGP Corporation
[e-mail]

[wbenton]

Death and taxes...

The only 100% for sure things are Death and Taxes.

Walt

[alek_nedic]

Does anyone see something wrong here?

http://www.analogstereo.com/mazda_5_owners_manual.htm

[wbenton]

Place foot in mouth... chew vigorously

Boy oh boy... if this doesn't make the icing on top of the cake for Microsoft's ill found understand about security.

What was considered to take 27,000 years to decrypt back in the early 1990's is now breakable within 15 seconds.

That said... I think Bill Gates needs to take a leap from a tall building like superman... and I'll provide him with a cape for free... (* LOL *)

FWIW