Koumbit.org

Pour un internet libre et solidaire

On Deniability and Duress

Imagine you’re at a border crossing, and the guard asks you to hand over all of your electronics for screening. The guard then asks that you unlock your device, provide passwords and decryption keys. Right now, he’s asking nicely, but he happens to be carrying an unpleasant-looking rubber hose, Yes, cryptographers actually do call this “rubber hose cryptanalysis.” and appears to be willing to use it. Now imagine you’re a journalist covering war crimes in the country you’re trying to leave. So, what can you do?

This isn’t a hypothetical situation. The Freedom of the Press Foundation published an open letter to camera manufacturers requesting that they provide “encryption” by default. The thing is, what they want isn’t just encryption, it’s deniability, which is a subtly different thing.

Deniable schemes let you lie about whether you’ve provided full access to some or all of the encrypted text. This is important because, currently, you can’t give the guard in the above example a fake password. He’ll try it, get locked out, and then proceed with the flogging

Michael A. Specter On Deniability and Duress

Permanence téléphonique

☏ +1 514 907 9494
Lun: 10h à 12h
Mar/Mer: 10h à 12h et 13h à 16h
Jeu: 10h à 12h
Mon: 10AM to 12PM
Tue/Wed: 10AM to 12PM et 13AM to 16PM
Thu: 10AM to 12PM

Venez nous voir!

6833, avenue de l’Épée, Bureau 308, Montréal (Québec) H3N 2C7, Canada
Veuillez noter que nos bureaux n'ont pas de stationnement attitré.
6833 de l’Épée Avenue, #308, Montreal, Quebec, H3N 2C7, Canada
Please note that you'll need to find on-street parking.

Écrivez-nous

Informations générales

Support technique

Pour une demande de devis, voir le formulaire à la page contact.

General inquiries

Technical support

For a free estimate, see the form on our contact page.

Suivez-nous

ktweb_menu_social