Stayjuice You're comparing 2 unrelated things. MIE is Apple's integration of MTE. It doesn't have to do with the secure element. GrapheneOS has been using MTE more broadly since October 2023 when the Pixel 8 launched with it. Since Apple is launching it later, they're using a newer revision of MTE with some advantages which will be available elsewhere too. FEAT_MTE4 (EMTE) won't be Apple exclusive and neither will protections against side channels for MTE. GrapheneOS still uses MTE much more broadly than iOS and will continue improving our integration including deploying stack allocation MTE which we've been testing for a while now.