Skimming through it this seems largely a description of historic and broken cryptography and almost no information about practical modern cryptography.<p>(also the obligatory note: no HTTPS for a webpage about cryptography?)
> Cryptography refers almost exclusively to encryption<p>Ooof first line. That's like saying math refers almost exclusively to physics. Grabbing that name from a well respected and popular book as well.<p>Tsk. Tsk.
Interesting that Sir Francis Bacon counted in binary, which wasn't formally invented until after his death:<p><a href="http://practicalcryptography.com/ciphers/classical-era/baconian/" rel="nofollow">http://practicalcryptography.com/ciphers/classical-era/bacon...</a><p>edit:
Binary "invention" - <a href="http://www.computinghistory.org.uk/det/5913/Gottfried-Wilhelm-Leibniz-invents-the-Binary-System/" rel="nofollow">http://www.computinghistory.org.uk/det/5913/Gottfried-Wilhel...</a>