All over google and wiki i'm not able to understand the rijndael s-box key scheduling...
Can anyone explain them in simple words and with an clear example????
Check this flash presentation, I've seen it when I was studying the Rijndael Cypher and it was all I needed to understand it, hope you like it too :)
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Hi! i wana help you to resolve document problem
But first I need to know what kind of documentation problem you are having
As a programmer, are you afraid to write documentation?
Writing documents is very easy for me
I know how to write, but I can't present it well
A bit shy because of the long presentation
I don't know how to present it properly
Don't want to write
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I think it would help explain the code better, but what do I know, I am just a newbie, an alternative would be little audio notes as code comments.
Is this allowed, possible, desirable, or I am just saying incoherent stuff here?
There would be a lot of practical issues that would make audio notes embedded in source code problematic.
However...
You may be someone who thinks best when speaking to another person, and not someone who finds it natural to articulate their thoughts when writing. If that is the case, find out which text-to-speech converters you like best, and use them to dictate your thoughts. Then embed the text into the program source as comments.
The title says it all... I can't seem to get the idea... I know it uses the index of coincidence but I'm not sure with whom or what am I supposed to compare it with... How is the formula used?... It would help me a lot if it were exposed in an algorithmic representation...
This link should probably light up your mind...
http://practicalcryptography.com/cryptanalysis/stochastic-searching/cryptanalysis-vigenere-cipher/
I'm using the book Cryptography Theory and Practice Third Edition, and it's horrible. It states the formula but never a concrete example.
I saw this video and I was amazed, and naturally, I want to try to do it myself. http://www.youtube.com/watch?v=P_DeZUg9HiY
Does anyone have any idea how he made the character walk? Look at the video at 1:15. What kind of Bullet physics constraints do you think he's using in the legs? Is he making some kind of springs?
This is a huge area of academic research. See this paper for starters:
http://graphics.stanford.edu/projects/bio-locomotion/
A game could definitely use a much simpler control scheme than that used in the paper.
Evening all,
I have just began my final year at university and am studying cryptography. We have just been set the first assignment just 3 weeks in so I'm assuming it won't be a case of breaking the enigma code.
As part of the assignment there are 7 exercises with 2 further challenges consisting of various ciphers (Caesar, Vigenere, Transposition and general Substitution).
I'd like to code some sort of application to be able to decrypt these ciphers.
I don't want to cheat, im genuinely interested in the topic and feel by coding an application to decrypt the codes I'd get more out of the assignment, having to think logically about resolving each.
I'd like to think i'm reasonably competent in Java, VB and or Javascript/HTML/CSS. So any of these platforms I'm happy to try with.
If anybody can advise any pointers I'd be grateful.
Many thanks
Gary
I recommend Simon Singh's "The Code Book"; it features Caesar, Vigenere, transposition+substitution, all the way through Enigma, Lucifer (DES) and up to asymmetric and quantum crypto, along with the ways to break some of these ciphers. The Vigenere chapter explains the cryptanalysis in great detail.