Here's an interesting interview with Matthew Green. Building an encryption backdoor is like "asking for a cake that tastes delicious and is wonderful but won’t make you gain weight." https://www.marketplace.org/shows/marketplace-tech/does-encryption-help-with-privacy-or-does-it-violate-public-safety/
That's why we strongly oppose them: https://tutanota.com/blog/posts/why-a-backdoor-is-a-security-risk/
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