On Fri, Dec 27, 2013 at 12:25:47AM +, Peter Maxwell wrote:
If you view the moving-the-bishop as an s-box lookup, and apply it to
itself three times (composition), you end up with another s-box of the same
size, lets call it S. Given S doesn't change, things should be rather easy
indeed.
I created a new hand cipher over the past few weeks, and announced it on my
blog yesterday. I'm curious what people on this list think.
https://pthree.org/2013/12/25/the-drunken-bishop-cipher/
The idea comes from taking an 8x8 chessboard, and assigning the values
0-63 randomly and uniquely
On Thu, Dec 26, 2013 at 04:28:06PM -0300, Andrew Cooke wrote:
the way that you use the plaintext to avoid short cycles (the output number
etc) is worrying - it might open you up to a chosen plaintext attack in some
way.
replying to myself, sorry (but at least not top-posting this time) i
On 12/26/2013 2:05 PM, Aaron Toponce wrote:
I created a new hand cipher over the past few weeks, and announced it on my
blog yesterday. I'm curious what people on this list think.
https://pthree.org/2013/12/25/the-drunken-bishop-cipher/
The idea comes from taking an 8x8 chessboard, and
On 12/26/2013 2:28 PM, andrew cooke wrote:
the way that you use the plaintext to avoid short cycles (the output number
etc) is worrying - it might open you up to a chosen plaintext attack in some
way.
and thinking about chosen plaintexts - if you encode a message that is all
zeroes, what does
On Thu, Dec 26, 2013 at 04:28:06PM -0300, andrew cooke wrote:
the way that you use the plaintext to avoid short cycles (the output
number etc) is worrying - it might open you up to a chosen plaintext
attack in some way.
and thinking about chosen plaintexts - if you encode a message that is
On Thu, Dec 26, 2013 at 2:44 PM, Aaron Toponce aaron.topo...@gmail.com wrote:
... I've thought of incorporating
Blum Blum Shub into the algorithm, but then the cipher is getting decidedly
difficult to execute by hand.
BBS is not practical in practice due to the size of the moduli
required. You
On Thu, Dec 26, 2013 at 05:57:11PM -0300, andrew cooke wrote:
here's my suggestion on a possibly harder version.
first, remove the complicated edge rules. instead, imagine that the
board repeats. so something leaving nort from h4 will arrive at a7.
this might help remove biases from the
On Thu, Dec 26, 2013 at 02:04:29PM -0700, Aaron Toponce wrote:
On Thu, Dec 26, 2013 at 05:57:11PM -0300, andrew cooke wrote:
here's my suggestion on a possibly harder version.
first, remove the complicated edge rules. instead, imagine that the
board repeats. so something leaving nort
On Thu, Dec 26, 2013 at 06:18:47PM -0300, andrew cooke wrote:
you don't have to reverse it (unless i am confused)! that's the beauty of a
stream cipher. encryption and decryption are the same, except you remove the
random stream instead of adding it.
Ah, yes. I'm not thinking clearly. I was
On 26 December 2013 19:56, Aaron Toponce aaron.topo...@gmail.com wrote:
On Thu, Dec 26, 2013 at 02:53:06PM -0500, Jeffrey Walton wrote:
On Thu, Dec 26, 2013 at 2:44 PM, Aaron Toponce aaron.topo...@gmail.com
wrote:
BBS is not practical in practice due to the size of the moduli
required.
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