Explain the security drawbacks of DVD

We’re telling users about some security benefits of booting Tails from a DVD (as opposed to from a USB stick), but there are some drawbacks too. Let’s start by listing them…

• Once we get Tor persistent state, Tor will be stronger with persistence.
• Without persistent you might be tempted to not use asymetric encryption, persistent keys, and fallback on weaker solutions.
• No automatic upgrades. That’s not practical, and if you don’t take the time to upgrade manually, it’s a security risk.
• A malicious or buggy DVD drive’s firmware can modify the Tails system on-the-fly.

Parent Task: #9884 (closed)

Original created by @sajolida on 9832 (Redmine)