Marcy Wheeler has some background on this -- <a href="https:&#x2F;&#x2F;www.emptywheel.net&#x2F;2015&#x2F;11&#x2F;18&#x2F;brennan-was-probably-talking-about-the-telegram-prism-gap-as-much-as-encryption&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.emptywheel.net&#x2F;2015&#x2F;11&#x2F;18&#x2F;brennan-was-probably-t...</a>