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This isn't exactly an answer to the question you asked - but I believe at least India mandates SMS use A5/0 which means SMS cannot legally be encrypted. (This
by bigiain 9y ago
This isn't exactly an answer to the question you asked - but I believe at least India mandates SMS use A5/0 which means SMS cannot legally be encrypted.
(This is half-remembered memory from a DefCon talk I watched on YouTube recently: https://www.youtube.com/watch?v=fQSu9cBaojc https://www.youtube.com/watch?v=fQSu9cBaojc )