“What I’ve been told is that someone on the APL [Johns Hopkins’ Applied Physics Laboratory—motto: ‘Enhancing national security through science and technology’] side of JHU discovered my blog post and determined that it was hosting/linking to classified documents. This requires a human since I don’t believe there’s any automated scanner for this process. It’s not clear to me whether this request originated at APL or if it came from elsewhere. All I know is that I received an e-mail this morning from the Interim Dean of the Engineering school asking me to take down the post and to desist from using the NSA logo. He also suggested I should seek counsel if I continued.”
http://arstechnica.com/security/2013/09/crypto-prof-asked-to-remove-nsa-related-blog-post/