That's the false duality. NSA cannot "be stopped," but they don't use every tool they have available on every mission. When conducting foreign intelligence operations against high-value targets they will use 0days you can't secure against. When they're unconstitutionally surveiling you they'll use http and a large language model. Your inalienable rights are going to be violated by a deal with Google Cloud, not a quantum computer, or even a kernel bug.
In this context, the purpose of tools like "five way secret sharing" is to communicate in a way that can't be broken without revealing the existence of the 0days and exceptions to the judicial process by using them on a hundred million citizens at once. The threat model is a lot of very smart engineers who can passively listen to anything that gets sent over the internet, not Perry the Platypus.
In this context, the purpose of tools like "five way secret sharing" is to communicate in a way that can't be broken without revealing the existence of the 0days and exceptions to the judicial process by using them on a hundred million citizens at once. The threat model is a lot of very smart engineers who can passively listen to anything that gets sent over the internet, not Perry the Platypus.