- Given the huge amount of material classified these days, SECRET doesn't seem to be a very high level any more, ... really important stuff is compartmented (SCI), and Suite B is not approved for it - it has to be protected by unpublished Suite A algorithms.
SCI is an access control, not a separate classification level. Though the specific compartmentalization might require various other crypto. https://en.wikipedia.org/wiki/Classified_information https://en.wikipedia.org/wiki/Sensitive_Compartmented_Information https://en.wikipedia.org/wiki/Special_access_program
[ insert campaign for Snowden to release Suite A specs here. ]
So far his dataset has not shown any access to, nor much interest, regarding the crypto dept. Then, even if it does drop someday, you have to wish that the news reporters publish the actual doc instead of uselessly paraphrasing it in an effort to claim interpretive credit. If there's breaks with any "B" or other respected public algos, you can bet they keep that well compartmented. Losing some node somewhere is no big deal. Going dark on all your nodes as a result of wholesale crypto replacement response would be a big deal. Knowledge of "A" would indeed be interesting to instructive.