How does the Google Play signing certificate looks like Since some time it is possible to opt in for Application to be signed with Google maintained key. How does the certificate looks like? Is it a self signed one like before, or maybe it is issued from some Google one?
As far as I know the applications signed by Google is simple that you upload your private key + certificate and Google then performs the signing instead of the app developer. The certificate and the created signature is identical to the one created by a developer.

I would assume that Google introduced this feature because a lot of developers loos their app signing keys and are then unable to publish updates for an existing app.