[RexRollman]

If I recall correctly, Google is facing a patent lawsuit over the Courgette technology. I don't remember if the complainant was a patent troll or not.

[itsnotvalid]

Whatever the outcome would be, that is enough to stop people from using this piece of open source software to provide safer updates.

[morsch]

As stated above, courgette doesn't provide safer updates, just smaller ones. It's just a really smart executable binary diff. Signing the update is an orthogonal issue.