Five years ago, the National Security Agency (NSA) released 136 issues of its internal Cryptolog periodical spanning 1974 through 1997. The collection offered a look into the some of the discussions being held within one of America’s most secretive intelligence agencies. Today the GWU-based National Security Archive is providing a complete index of all 1,504 items in the declassified collection, including but not limited to articles, interviews, and puzzles.

source: SOS