Clever but useless.
Cold boot attack does not work on RAM with DDR3+.
Pretty much all new computers are safe.
<a href="http://superuser.com/a/464396" rel="nofollow">http://superuser.com/a/464396</a>
Another implementation using ARM support for cache locking: <a href="http://research.microsoft.com/~ssaroiu/publications/asplos/2015/sentry.pdf" rel="nofollow">http://research.microsoft.com/~ssaroiu/publications/asplos/2...</a>