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cryptography & cryptanalysis
Posted: Fri Jul 05, 2013 8:30 pm
by VirtLands
Hi, I recently found this,...
For anyone that would love to find out about the complex math behind cryptography,
CrypTool 2.0 is a free ( learning tool ) program that teaches you all about it.
http://www.cryptool.org/en/
[sample screenshot of RSA encryption method]
Cryptool covers every topic including, 15 classic Ciphers, 22 modern Ciphers, and lots of hash.
+ Classic Ciphers
+ Modern Ciphers
+ Steganography
+ Hash { a dish of diced or chopped meat and vegetables }
+ Cryptanalysis { is where you try to decipher others' secret codes, find the passkeys }
The CrypTool 2 program is self-updating, so, let it update, and then restart the software.
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Cryptool-ONLINE, shows about 30 classic ciphers:
http://www.cryptool-online.org/index.php?Itemid=29
http://www.cryptool-online.org/
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Mystery Twister C3 : Contest
https://www.mysterytwisterc3.org/en/ :
Have fun.
Posted: Fri Jul 05, 2013 10:37 pm
by Muzozavr
Always found cryptography interesting, but was never a fan of solving anything more complex than a Caesar cipher. Seriously, I can't even solve a regular substitution cipher with pen and paper. I know the whole "probability" trick, but could never actually do it. Your links, however, might change that.
encryption
Posted: Fri Jul 05, 2013 11:19 pm
by VirtLands
Muzozavr wrote:Always found cryptography interesting, but was never a fan of solving anything more complex than a Caesar cipher. Seriously, I can't even solve a regular substitution cipher with pen and paper. I know the whole "probability" trick, but could never actually do it. Your links, however, might change that.
I can't solve a substitution cipher either. 
I think that with practice, a person can invent a brand new cipher algorithm, beyond those already known.
When I have time, I'll read more into it.
Re: encryption
Posted: Fri Jul 05, 2013 11:31 pm
by Muzozavr
VirtLands wrote:Muzozavr wrote:Always found cryptography interesting, but was never a fan of solving anything more complex than a Caesar cipher. Seriously, I can't even solve a regular substitution cipher with pen and paper. I know the whole "probability" trick, but could never actually do it. Your links, however, might change that.
I can't solve a substitution cipher either.
I think that with practice, a person can invent a brand new cipher algorithm, beyond those already known.
When I have time, I'll read more into it.
It's incredibly easy to invent a cipher. It is extremely hard, however, to invent a cipher
that's actually secure. 
BTW - I can't register at the contest, the ReCaptcha doesn't show up.
Oh well.
compression and obfuscation
Posted: Sat Jul 06, 2013 6:58 pm
by VirtLands
You may also like the following:
OpenPuff: { steganography }
http://embeddedsw.net/OpenPuff_Steganography_Home.html
TrueCrypt { encryption }
http://www.truecrypt.org/
KGB Archiver
{ Compression program,
compresses files even more than other programs, the downside is that it is quite slow. }
http://www.softpedia.com/get/Compressio ... iver.shtml
FastPack { EXE packer }
http://www.softpedia.com/get/Compressio ... k-32.shtml
UPX-it 1.6.2 { EXE packer , requires administrator mode }
http://www.softpedia.com/get/Programmin ... PXiT.shtml
UPX 3.09 { another EXE packer }
http://upx.sourceforge.net/