Hi, I'm the author ;) I've just been made aware that Bouncy is packaged with Ubuntu these days (cool!) but it's broken (boo!) and there's a bug report in Launchpad for it: https://bugs.launchpad.net/ubuntu/+source/bouncy/+bug/140418 There's a new release at: http://www.pyweek.org/e/bouncy/ which fixes the bugs I'm aware of. Richard