If you are a journalist, or anyone else that must fear a repressive state, email is inherently unsafe, because you can't hide who you are talking with (i.e., metadata).

The article refers to trade secrets as "intellectual property", which is a gratuitous confusion because it conflates them with unrelated issues such as copyrights and patents. Every time the term "intellectual property" is used, it causes confusion — please join me in avoiding that term.