A pre-WWII NSA document on advanced military cryptography which was declassified in 2014. This leads to the question of what impact disclosing these military secrets has on encryption and decryption of messages in future wars, and also why were these documents released in the first place.
This article, combined with the guide to staying completely anonymous on the internet linked at the end of it, suggest that one of the easiest ways to be anonymous online is to use a private browser like Ghostery, or a private search engine like DuckDuckGo. These services don't track your information the same way that Google does, making your online browsing experience more private and secure.
Recently China blocked the Facebook app "Whatsapp," and I find this interesting because by the decision of their government, they can decide your intake of content from the outside world and where to cut it off. Some parts of this relate to Cryptography because people have become very creative in getting around firewalls and accessing blocked sites anyways.
Now that the NSA has declassified this information about cryptanalysis, either they can no longer utilize these methods of cryptography, or must do so with caution, knowing that anyone has the resources to crack them. Was it ethical of the NSA to release this information, especially if other countries still use these methods to create ciphers?