Welcome to TabulaRecta.net. You may be wondering why I chose this
My profession, in other words how I make my living, is in the computer
security field with cryptography being one of my areas of interest.
My friends might argue computer security is just a part of what
I do. I'm not going to give a history of cryptography, or an other
security concept for that matter in exhaustive detail on this site.
I will however share brief snippets of history and/or commentary
on current events in security and other subjects or events I find
especially interesting. I have been doing this a long time, sometimes
I think too long.
Back to our story. If you are here and are in the computer security
professsion and perhaps have your CISSP
or are just intersted in cryptography, you may already know what
the tabula recta is. The term Tabula
Recta is Latin. In cryptography, a tabula recta is a square
table with the letters of an alphabet on it's X and Y axis. English
is generally used, but any other language that has a defined alphabet
can be used. In this table the letters of the lanuages alphabet
are placed going from the top down along the Y axis and orienting
across the top from the left to right along the X axis. For each
row in the table you take the alphabet across the top, and each
row is shifted by one character.
This table can now be used to "encrypt" and "decrypt" a message
by locating across the top row the first letter to be encrypted,
and then going down that column to the row that corresponds with
the "key" on the left side of the table.
You can read more here
and use this as jumping off point for your education. I personally
don't like this page in Wikipedia because I think it could be written
more clearly, but then I guess I should be contributing to it and
fixing it instead of writing why I don't like it. Johannes
Trithemius used the tabula recta in about 1518 to create polyalphabetic
ciphers among other great works like the Steganographia. Would have
been cool to have a beer with this guy.
I wanted to use scytale.net, but it was already taken. You can read
about it here.
In case you want to email, I can be reached at email@example.com
DISCLAIMER: Lets get the disclaimer up front. I created this
site for my own personal reasons. All content is owned by me (the
site owner/operator) unless credit is explicity given and permission
has been granted to use the content. It is not intended to be educational
(although you may find it illuminating and/or humorous) and as such
I advise against referencing this site as authoritative on anything
other than my opinion. The site is mainly my own personal opinions.
The site may have links to other public news sites or other online
sources and I do not control their content and may nor endorse their
content but find it interesting. Your continuing to visit this site
is explicit acknowledgement of this disclaimer whether or not you
read it, and the author is not liable for what you may do with content
on this site if you get in trouble.
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