[cryptography] NSA History of Traffic Analysis
jya at pipeline.com
Wed Jul 24 19:01:34 EDT 2013
NSA released on 23 July 2013 "The History of Traffic Analysis:
World War I-Vietnam."
It notes the formation of T/A (Traffic Analysis) and C/A (Cryptanalysis)
as the two elements of code-breaking, using the mail analogy of T/A
for the envelope, C/A for the contents.
As noted elsewhere T/A is now publicized as "metadata."
More information about the cryptography