Re: usb memory sticks
- From: Jim Howes <sewoh.mij@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Fri, 11 May 2007 15:18:26 +0100
if wrote:
I see some sticks advertise built in encryption. Does anyone know if this
is truly standalone or does it depend on software you install on the
computer? Any recommendations for particular brands/models? We're looking
to get half a dozen 2GB sticks as cheap as possible.
Whether the data is actually stored encrypted on the device, or the device
simply needs a password to make it go is something to be investigated.
You can always use an encrypted ZIPfile. The encryption in ZIP files is
actually very strong, however it is subject to known-plaintext attacks* (Putting
a ZIP file (or any other archive for that matter) into an encrypted ZIP file
presents enough of a headache to prevent known-plaintext attacks though)
(and some ZIP-generating stuff runs from the command line, so is easy to script)
Jim
* Known plaintext attack: A method where the encryption key (not necessarily the
actual password used to encrypt data in the case of ZIP) can be recovered by
comparing encrypted data to unencrypted data that is similar enough. Microsoft
Word documents are a pleasure to crack, given the tendency to have lots of 0xFF
bytes from 0x50 to 0x1FF regardless of actual textual content.
(PS. In some countries, the above comments are probably an illegal circumvension
device, and illegal to know. Forget I said it...)
.
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