[jevinskie]

Well, unfortunately jailbreaking "fixes" the problem by ruining code signing integrity on the device. Ideally, the jailbreaks would leave code signing enforcement in effect but just augment the default trusted CAs/CDHashes. I'm disappointed that AOSP never gained the code signing framework that iOS has, allowing people to have better Freedom and Security simultaneously.

[mahouse]

Well, you can't update an app with the same app signed with another certificate.