Verum Inveniri is back with part 2 of the code class for those who want to see how its done.

Verum Inveniri is back with part 2 of the code class for those who want to see how its done. #nianticproject   #ingress  

Originally shared by Verum Inveniri

Transposition (part 2)

How many different ways can you shuffle letters? Lots, as it turns out! Here is a partial list of methods you might want to keep in mind:

Reversal - This one’s easy, and can usually be spotted visually.

Railfence - We looked at this in the previous post.

Boustrophedon - A fancy word for a writing system that reads left-to-right on the first line, and right-to-left on the next, and so on. The letters form a continuous snake down the page.

Transpose rows and columns - This can be as simple as reading rows as columns, or may be combined with other methods. If the number of characters doesn’t make a neat block, you can pad it to fit.

Spiral - Round and round...

Skip - Start with the first character, then skip over one (or more) characters, and continue, looping around to the beginning when you reach the end.

Columnar Transposition - Number each column, then switch them around. So, columns 1, 2, 3, 4 might become columns 2, 4, 1, 3.

We might do more detailed posts about some of these methods in the future, but the next post will be a look at cryptanalysis.

When you solve the example, don’t give the answer to anyone else! Share this post with your friends instead. If you need help with cryptography, come to #veruminveniri on irchighway.net to talk.
http://irc.lc/irchighway/veruminveniri/VI@@@

#ingress #cryptography