But researchers from two-factor authentication service Duo Security told Ars that an estimated 37 percent of all the Android phones that use the Duo app remain susceptible to the attack because they have yet to receive the patches. The lack of updates is the result of restrictions imposed by manufacturers or carriers that prevent end users from installing updates released by Google.
Beyond hacks, Beniamini said the design makes it possible for phone manufacturers to assist law enforcement agencies in unlocking an encrypted device. Since the key is available to TrustZone, the hardware makers can simply create and sign a TrustZone image that extracts what are known as the keymaster keys. Those keys can then be flashed to the target device.
And double yikes: do we now need to get phone manufacturers to release transparency reports that indicate whether they’ve compromised devices after receiving requests to do so from law enforcement agencies?
Excited Pixels 