He mentioned that IDEA, not the implementation nor Tor were invented by the Navy.
I have no sources on either, but it does seem plausible that solution similar or exactly the same in the concept was used for communication during warfare.
Tor exists at least in part because the US DOD decided that investing money in countering online censorship was a worthy use of military funding. This seems like an important point; it is not made effectively by the article.
> He mentioned that IDEA, not the implementation nor Tor were invented by the Navy.
Actually a creator and core developer of Tor is from the Navy. The implementation came from this person as much as it did from arma and nickm (the other 2 creators)
I have no sources on either, but it does seem plausible that solution similar or exactly the same in the concept was used for communication during warfare.