Any proof would obviously be classified. But there is a lot of circumstantial evidence.<p>1. He made the statement in the OP. That implies that normal people using modern encryption does not impose a significant barrier to the NSA doing their jobs. Contrast with the 90s when the NSA pushed for the clipper chip, presumably because they couldn&#x27;t eavesdrop effectively otherwise.<p>2. The NSA uses its own secret suite A algorithms for things they really care about keeping secret, not the suite B algorithms like AES that they recommend for the rest of us through NIST.