what does it mean when it says advanced message security unavailable

i’m trying to text my friend and the bubbles are showing up green so when i went to info it said ‘contact key verification’ and then next to his name it said ‘unavailable’…. is that something he did on his side of the phone ?

iPhone 13

Posted on Sep 5, 2024 11:50 PM

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what does it mean when it says advanced message security unavailable

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