The article takes a look at why NSA spying is inherently illegal, and substantiates the claim with official documents. Great for pro-privacy arguments, but also a good counterargument to address for pro-security.

This is the e-text of a book that discusses online network encryption and application. The chapters cover various encryption methods for the transfer of data online, as well as the application of wireless, email, IP network security

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.