Encryption and signing of a data file

[Leigh S. Jones]

> Could anybody tell me whether I can do this kind of simultaneously
voting
> and singing with GnuPG?

This can be implemented, but the encryption and signing by the
voter will be two distinct steps from the viewpoint of gpg.

> Could I alternatively do this kind of voting by using mails instead
of a
> data file? Here I had the same problems.

There's nothing preventing you from implementing this.  In fact, if
you
are capable of programming the mechanisms for automating the
actions of the trustees, then a fully automated voting system complete
with return notification of success or failure of the vote process is
quite possible.

I should think that the major problem with your scheme is that there
might be some resistance on the part of the voters to fully implement
the scheme.  Part of this would be due to the complexities of voting,
encrypting, signing, and sending, and part of this would be due to
the complexities of installing gpg itself.  How many different
computer
platforms are your voters using?

----- Original Message -----
From: "Gries, Jasmin" <Jasmin.Gries@dlr.de>
To: <gnupg-users@gnupg.org>
Sent: Thursday, June 20, 2002 1:20 AM
Subject: Encryption and signing of a data file


> Dear GnuPG-users,
>
> as I want to test a kind of electronic voting by using GnuPG I tried
first
> to encrypt a data file and then to sign it (exactly in this reverse
order),
> but I doubt whether this is possible at all?
> For a better understanding enclosed the modell of the planned
voting.
>
> Participants:
> Voters
> 2 trustees (trustee 1+trustee 2)
>
> Implementation:
> 1) Voters encrypt their vote with the public key of trustee 2
> 2) Voters sign their encrypted vote
> 3) Voters send their encrypted vote to trustee 1
> 4) trustee 1 will check, if the voter is entitled to vote and if he
has
> casted only 1 vote
> 5) if this is ok, then trustee 1 will remove the signature
> 6) trustee 1 signs the encrypted vote
> 7) trustee 1 sends encrypted and signed vote to trustee 2
> 8) trustee 2 will check, if the encrypted vote is transmitted
lawfully
> 9) trustee 2 decrypts the vote and compiles statistics on the vote
> trustee 1 knows the voters, but not their vote
> trustee 2 knows the vote, but not the voters
> If the ballot is appealed
> - trustee 1 can definitely prove which persons have voted
> - trustee 2 can definitely prove which votes he has received freom
trustee 1
>
> Could anybody tell me whether I can do this kind of simultaneously
voting
> and singing with GnuPG?
> Could I alternatively do this kind of voting by using mails instead
of a
> data file? Here I had the same problems.
>
> Thanks for your help!!!
>
> Jasmin
>
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