Piqûre de rappel concernant une évidence : aujourd'hui, rien ne permet d'affirmer que les terroristes de terrain utilisent la crypto ou la stegano... Juste des téléphones dédiés à l'acte terroriste avec des cartes prépayées... Et ça, ça ne sera pas interdit puisque même un ex-président de la France s'en sert pour déjouer les éventuelles écoutes et pour brouiller les pistes. Pas vrai, Sarko ? :)

« New details of the Paris attacks carried out last November reveal that it was the consistent use of prepaid burner phones, not encryption, that helped keep the terrorists off the radar of the intelligence services.

As an article in The New York Times reports: "the three teams in Paris were comparatively disciplined. They used only new phones that they would then discard, including several activated minutes before the attacks, or phones seized from their victims."

[...] For example: "Security camera footage showed Bilal Hadfi, the youngest of the assailants, as he paced outside the stadium, talking on a cellphone. The phone was activated less than an hour before he detonated his vest." The information come from a 55-page report compiled by the French antiterrorism police for France’s Interior Ministry.

[...]

As The New York Times says, one of the most striking aspects of the phones is that not a single e-mail or online chat message from the attackers was found on them. That seems to be further evidence that they knew such communications were routinely monitored by intelligence agencies. But rather than trying to avoid discovery by using encryption—which would in itself have drawn attention to their accounts—they seem to have stopped using the Internet as a communication channel altogether, and turned to standard cellular network calls on burner phones.

[...]

This new information that the Paris attackers did not routinely use encryption, if at all, but turned instead to the tried-and-tested technique of burner phones, undermines the argument that everyone's communications must be weakened in order to tackle terrorism. »