So you’re saying, that a private key within the TEE expired… So they probably had to write a custom TEE program in-order to rotate it? Along with actually securely delivering it.

So… Did we (someone) manage to capture it? Ultimately though each device is going to have to request a new key, so even with a jailbroken TEE you’re still only going to be capturing the key for that specific device. The key would be how they implemented the verification that an expired device was allowed to get a new key and that verification… Idk not an expert in widevine keys and such but I assume that cert chain expired.