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Re: Encryption (Citi appears to store only last 4 digits of credit cards)

 

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Re: Encryption (Citi appears to store only last 4 digits of credit cards) Bob Wang 05-03-2006
Posted by Antoine Mitchell on May 6, 2006, 6:27 pm
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>> Since the free, open-source TrueCrypt product (mentioned earlier by me
>> and someone else) has 256-bit AES encryption ability, there's really
>> little reason not to use that level of encryption.
>Actually there's really little reason to use it considering the chances
>of it being needed.

Perhaps, but it's extremely easy to set up an encrypted volume and keep your
personal
data there. It makes it much easier to keep your data secure in case your PC
gets stolen
(especially if it's a laptop) or if you need to bring your system in to a
computer shop
for servicing.

>Then again I've always found it extremely difficult
>to reason with paranoid people because if there's one tiny iota of a
>chance they will constantly argue without. It's like trying to explain
>to advid lottery players that they odds are really slim....

There's a difference between paranoia and good common sense. If you have data
that you
don't want other people to see, it makes sense to keep it encrypted, even if
it's on a PC
that you normally control.

Posted by Mark Hood on May 8, 2006, 5:30 pm
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> One thing about Windows NTFS encryption - only the exact user account that
> created the files can access them. If you delete your user account, and
> recreate the account with the exactly same username, you will not be able
> to see your encrypted files because your new account was not the exact
> account that created them.

I don't think that's true (I haven't tested it however).

EFS creates a personal security certificate based on the user account.
You can copy this certificate onto removable media (mine is on a thumb
drive, protected with a password), remove it from Windows, and then
nobody can read the encrypted files (including yourself) until you
import the certificate again and supply the password.

Presumably, if you have the certificate and password, you can import
it into another account and read the encrypted files (I'll try this
tonight).

To get access to your encryption certificate, enable EFS, go to
Internet Options in the Control Panel, select the Content tab, and
then select Certificates -- you should then see your personal
certificate in the next pane. From there you can export it to
anywhere you want, and remove it if you like. To re-import it, double
click on its icon from wherever you copied it.

I use EFS because it's convenient and transparent, but it probably
isn't as strong as I would like.

-- Mark

Posted by Mark Hood on May 8, 2006, 11:48 pm
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> Presumably, if you have the certificate and password, you can import
> it into another account and read the encrypted files (I'll try this
> tonight).

Yep, it works as expected.

-- Mark

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