One signing key across 1 archived release. Android only installs an update signed by the same key as the copy already on your device, so a key that changes between releases is the clearest sign that a build did not come from the same source as the one before it.
2.1.1
Current key1 release · Jul 27, 2026Every key we have ever recorded for Nielsen Pulse. New builds are compared against this set; a build signed by none of them is what our badge calls a mismatch.