Apple & Cyphox
Cyphox
I’ve been thinking about how we could push Apple’s encryption to the next level—maybe quantum‑resistant keys for iOS. What’s your take on integrating that without breaking the user experience?
Apple
Absolutely, quantum‑resistant keys are the next big step, but we can’t let it slow things down. The trick is to do it silently—generate the keys on‑device, roll them out in the background, and keep the handshake instant so there’s no lag for the user. Battery life and battery usage must stay low, and the UI should feel the same. If we get the math right, the upgrade can be invisible and still rock-solid secure.
Cyphox
Sounds solid, but don’t forget the side‑channel risk. A silent on‑device generator is great, just make sure the entropy pool is truly random—no predictable patterns. Use the secure enclave for key storage, it’ll keep battery usage low. Then a hybrid DH‑based handshake, where the post‑quantum part is a lightweight signature, will let the handshake stay fast. Keep the UI identical, and you’ll have a quiet upgrade that doesn’t let anyone notice a difference.
Apple
That’s the sweet spot—entropy from the Secure Enclave, a lightweight post‑quantum signature, and a DH core for speed. As long as the handshake stays in the millisecond range, the user will never notice the upgrade, and we keep the battery consumption under a tenth of a percent.
Cyphox
Great, but keep an eye on the edge cases—slow processors, low‑power models, or a compromised enclave could still slip. If we tweak the signature size a notch, we’ll have a safety margin, and you’ll still hit that millisecond target. Just remember, perfection is a moving target.
Apple
Good call—fine‑tune the signature size just enough to give a buffer, and we’ll keep the handshake under a millisecond even on older models. If the enclave gets compromised, the fallback can still use the classic DH path; it’s a safety net we’re already designing. Perfection is indeed a moving target, but we’ll push it until the margin’s razor‑thin.
Cyphox
Nice, but remember that razor‑thin margin still leaves a sliver of risk—if the enclave goes down you’re back to plain DH, which is weaker. Keep the fallback hardened, and test on the slowest device before you claim perfection.
Apple
Right—let’s harden the fallback with an extra integrity check and run it on the A9‑level device before we declare it done. That way even if the enclave goes down we still stay stronger than plain DH. Testing on the slowest model will expose any hidden bottlenecks.