Christos military and intelligence corner

This year I’ve added a new essay on the Compromise of Polish codes in WWII . This is a summary of the work done on Polish codes and ciphers ...

  In WWII Poland fought on the side of the Allies and suffered for it since it was the first country occupied by Nazi Germany. In the period...

Last year I did a lot of research on the Typex and M-209 cipher machines. While researching the Typex I also found interesting information o...

Cipher machines were extensively used by both the Axis and the Allies during WWII. The Germans had the Enigma , the Lorenz SZ 40/42 and t...

Recently new information was published on the M-209 cipher machine and this information coupled with all the material that I have collected ...

At the start of WWII, the US armed forces used various means for enciphering their confidential traffic. At the lowest level were hand ciphe...

I’ve been posting here since 2011 and during that time I have covered a variety of subjects on military and intelligence history. From t...

Since I no longer have any active cases I think it’s time to write a summary of my experience with the US freedom of information act program...