Now, no one bats an eye if you ship the most secure crypto you want.
To me, there are only two plausible explanations for the change:
1. The three letter agencies gave up on backdooring cryptography.
2. The three letter agencies successfully subverted the entire chain of trust.
Only one of them is consistent with a workforce consisting of highly motivated codebreaking professionals available working for many decades with virtually unlimited resources and minimal oversight.
To me, there are only two plausible explanations for the change:
1. The three letter agencies gave up on backdooring cryptography.
2. The three letter agencies successfully subverted the entire chain of trust.
Only one of them is consistent with a workforce consisting of highly motivated codebreaking professionals available working for many decades with virtually unlimited resources and minimal oversight.
The other is what people want to believe.
https://www.cs.cmu.edu/~rdriley/487/papers/Thompson_1984_Ref...