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Secure Device - Plaintext/Cyphertext size difference?
I just started using this program (secure device) yesterday. I love the
concept, however there is something that bugs the hell out of me... I set
it up for a 30-meg encrypted 'volume', and the file is indeed about 30
megs. However when I 'log in' to it, a dir shows only about ten megs of
space. I tried creating an additional secure device volume, and this one
was 25 megs on the outside and a bout 8 megs on the inside. From what I
glean from Applied Cryptography, IDEA usualy produces cyphertext
approximately the same size as the cleartext, right? so why the massive
difference in available space?
Happy Hunting, -Chris.
______________________________________________________________________________
Christian Douglas Odhner | "The NSA can have my secret key when they pry
[email protected] | it from my cold, dead, hands... But they shall
pgp 2.3 public key by finger | NEVER have the password it's encrypted with!"
cypherpunks WOw dCD Traskcom Team Stupid
Key fingerprint = 58 62 A2 84 FD 4F 56 38 82 69 6F 08 E4 F1 79 11
------------------------------------------------------------------------------
On Sat, 30 Apr 1994, Mike Ingle wrote:
> Secure Drive, the disk encryption system written by me and improved by
> Edgar Swank, has been completely rewritten by two programmers in the
> Netherlands, Max Loewenthal and Arthur Helwig. I was not aware of this
> until I saw the program yesterday.
>
> They changed it to Secure Device. It still uses the IDEA algorithm, but
> you no longer have to create a partition! Secure Device uses a file as a
> phantom partition, like Stacker or inDiskreet. It has a .SYS driver of
> about 6K. There is a login program, or you can use another TSR which does
> a pop-up login prompt. There is also keyboard logout and time-delay logout.
>
> Another advantage of Secure Device is ease of backup. You just backup the
> container file onto your tape, and the data stays encrypted. Secure Device
> includes source code and is copylefted.
>
> FTP wuarchive.wustl.edu, /pub/MSDOS_UPLOADS/cryptography/secdev11.arj.
>
> --- Mike
>
>