So that's a "yes"? Presumably you think, similarly, that if NSA, say, breaks all elliptic curve discrete log crypto, a random analyst inside NSA will be able to submit a ticket and break random crypto?
No, I don't think that's how it works. A class break in a core cryptography primitive or even a major break in a particular crypto format would be one of the most closely protected SIGINT secrets in the country; the number of people who would be exposed to even knowledge of its existence would be very low.
agee was a mere case officer and knew about minerva, wrote about it in the book he published in the 70s. snowden had access to documentation for dozens or hundreds of projects, many of which were much more damaging to leak (eg technical details for xkeyscore) than a pgp attack. nsa breaks things so their analysts can decrypt intelligence. it's not much use if your people can't use it.
agee was a mere case officer and knew about minerva, wrote about it in the book he published in the 70s.
Agee was higher up in the intelligence hierarchy than Snowden and the MINERVA secret, while a fairly big deal, is not nearly as big of a deal as 'NSA can break some kinds of modern crypto' would be.
More importantly, I think you're misreading what the new writeups on this story say about Agee's knowledge. He doesn't mention MINERVA and didn't know anything about the BND-CIA joint infiltration of the company. Here's what he writes in Inside the Company:
The National Security Agency cannot break this code system mathematically but they can do so if sensitive recordings can be obtained of the vibrations of the encrypting machine when the discs clack to a stop. The recordings are processed through an oscilloscope and other machines which reveal the disc settings. Knowing the settings, NSA can put the encoded messages, which are intercepted through the commercial companies, into their own identical machines with identical settings, and the clear text message comes out. Although the Swiss manufacturer when selling the machine emphasizes the need to use it inside a sound-proof room on a table isolated by foam rubber, we hope this particular code clerk is careless. If we can discover the settings on this machine in Montevideo, NSA will be able to read the encrypted UAR messages on the entire circuit to which their Montevideo Embassy pertains.
To further your point, even Snowden didn’t have access to the documents that tell us precisely what BULLRUN is able to do, or how.
(The speculation is, of course, with reasonable circumstantial support, is that it is a ~$1B program that has brute-forced the most common 1024 DH group in use.)
We simply don’t have the hard data, it is (educated) speculation based on what information we do have.
Even the existence of the program is TS. Its capabilities remain secret, due to the exact system you describe.
No, I don't think that's how it works. A class break in a core cryptography primitive or even a major break in a particular crypto format would be one of the most closely protected SIGINT secrets in the country; the number of people who would be exposed to even knowledge of its existence would be very low.