[Half-OT] Materials for a GnuPg Talk

[Noiano]

Hello everybody
and sorry for this half-ot message. For the linuxday I want to prepare a
talk about gnupg. I am thinking on starting to talk about privacy in
general (communications in clear and its problems), then taking a little
bit about cryptography (Caesar cipher, symmetric, asymmetric
cryptography) and then starting to talk about gnupg from the user point
of view.
Since I have never had any talk I am collecting materials to prepare a
decent presentation using impress. So I need images, animation and also
documents because I need to study :-).

Any help will be very appreciated.

Noiano

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