[HN Gopher] Modern iOS Security Features - A Deep Dive into SPTM...
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       Modern iOS Security Features - A Deep Dive into SPTM, TXM, and
       Exclaves
        
       Author : todsacerdoti
       Score  : 63 points
       Date   : 2025-10-13 18:23 UTC (4 hours ago)
        
 (HTM) web link (arxiv.org)
 (TXT) w3m dump (arxiv.org)
        
       | Moral_ wrote:
       | SEAR and the Apple team does an excellent job of security on iOS,
       | and should be commended greatly on that.
       | 
       | Not only are they willing to develop hardware features and plumb
       | that throughout the entire stack, they're willing to look at ITW
       | exploits and work on ways to mitigate that. PPL was super
       | interesting, they decided it wasn't 100% effective so they
       | ditched it and came up with other thigs.
       | 
       | Apple's vertical makes it 'easy' to do this compared to Android
       | where they have to convince the CPU guys at QC or Mediatek to
       | build a feature, convince the linux kernel to take it, get it in
       | AOSP, get it in upstream LLVM, etc etc.
       | 
       | Pointer authentication codes (PAC) is a good example, Apple said
       | f-it we'll do it ourselves. They maintained a downstream fork of
       | LLVM, and built full support, leveraged in the wild bypasses and
       | fixed those up.
        
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       (page generated 2025-10-13 23:00 UTC)