this post was submitted on 20 Sep 2023
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What security issues are you talking about? Universal Clipboard (via Handoff) operates over BLE locally. iCloud is used in part of the process to facilitate key exchange.
If the government/other actor is going through the effort of getting Apple to somehow disclose this key (assuming that it would even be possible) and lurk outside your window, you have bigger things to worry about.
https://support.apple.com/guide/security/handoff-security-secf78dbe639/web
Edit: I need to read up and differentiate
My mistake definitely for not trying to clarify these disparate terms beforehand. Thanks, I will try to do that
Read the link I provided. Apple documents the security mechanisms of how a lot of their services work. Universal Clipboard (and handoff) does not use iMessage.
You may find additional things documented here:
https://support.apple.com/guide/security/welcome/web
This whole area of their support site is well worth the read if you are concerned about security and privacy.
I've read a lot of their whitepapery security stuff but my understanding and differentiation of terms like "Continuity", "Handoff", "Universal ______", "Airplay" vs "Screen Mirroring" etc needs revision and reconsolidation.