CALEA can be used to intercept your communications, but mostly what an attacker gets is "metadata" ("so-and-so sent a message of X bytes to such and such") because the data is scrambled and they can't unscramble it, because cryptography actually *works*, unlike back doors.
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Of course, that's why governments in the EU, the US, the UK and all over the world are *still* trying to ban working encryption, insisting that the back doors they'll install will only let the good guys in:
https://pluralistic.net/2023/03/05/theyre-still-trying-to-ban-cryptography/
*Any* back door can be exploited by your adversaries.
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