I have fixed several errors contained in my last post.
-James
As for learning the placement of letters in the alphabet... I've found Base 3 is a pretty handy system. I mentioned it on my first posting here (page 2) and it's surprisingly convenient.
(Base 3, XYZ) -> (Decimal, 9X+3Y+Z)...
(wrote this up minutes before lecture; trying to run with presented ideas - characters -> bits information isn't very meaningful to me in a simple polyalphabetic cipher.)
Heuristic: group the cipher key into blocks of 5 letters- 40 characters requires eight 5-character blocks. While doing the...
I appreciate the responses and was surprised by their rapidity. I am human and fallible, so please forgive any errors in judgment or knowledge. Mental cryptography is something of which I'd like to improve. I hope this post is both useful and appropriate.
Side note: Neal Stephenson is one of...
I liked the topic, although this thread has likely gone the way of the dinosaurs
I think that there is a strong recreational component to the practice of mental cryptography. It can be made quite mathematical, however it's truthfully just heaps of mental algebra. Nothing too fancy that I know...