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README.md

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+CTF-Katana
+===============
+
+> John Hammond | February 1st, 2018
+
+--------------------------
+
+
+This repository, at the time of writing, will just host a listing of tools and commands that may help with CTF challenges. I hope to keep it as a "live document," and ideally it will not die out like the old "tools" page I had made ([https://github.com/USCGA/tools](https://github.com/USCGA/tools)).
+
+Hopefully, at some point I will develop software that will run through a lot of the low-hanging fruit and simple command-line tools, generate a report and have all the output in one place.
+
+
+---------------
+
+Steganography
+---------------------
+
+* [`steghide`][steghide]
+
+	A command-line tool typically used alongside a password or key, that could be uncovered some other way when solving a challenge. 
+
+* [`zsteg`][zsteg]
+
+* Morse Code
+
+	Always test for this if you are seeing two distinct values... _it may not always be binary!_
+
+* Whitespace
+
+	Tabs and spaces could be representing 1's and 0's and treating them as a binary message... or, they could be whitespace done with `snow` or 
+
+* `snow`
+
+	A tool for whitespace steganography (see above)
+
+Cryptography
+-----------------
+
+* XOR
+
+	ANY text could be XOR'd. Techniques for this are Trey's code, and XORing the data against the known flag format.
+
+* Caesar Cipher
+
+	https://www.dcode.fr/caesar-cipher
+
+* Vigenere Cipher
+
+
+* Beaufourt Cipher
+
+	[https://www.dcode.fr/beaufort-cipher](https://www.dcode.fr/beaufort-cipher)
+
+* Transposition Cipher
+
+* RSA: Classic RSA
+
+* RSA: Multi-prime RSA
+
+* RSA: Weiner's Little D Attack
+
+	The telltale sign for this kind of challenge is an enormously large `e` value. Typically `e` is either 65537 (0x10001) or `3` (like for a Chinese Remainder Theorem challenge)
+
+* RSA: Chinese Remainder Attack
+
+	These challenges can be spotted when given  mutiple `c` cipher texts and multiple `n` moduli. `e` must be the same number of given `c` and `n` pairs.
+
+* Elgamal
+
+* Affine Cipher
+
+* Substitution Cipher
+
+	[https://quipqiup.com/](https://quipqiup.com/)
+
+* Railfence Cipher
+
+	[http://rumkin.com/tools/cipher/railfence.php](http://rumkin.com/tools/cipher/railfence.php)
+
+
+* Playfair Cipher
+
+	[https://en.wikipedia.org/wiki/Playfair_cipher](https://en.wikipedia.org/wiki/Playfair_cipher)
+
+* Polybius Square
+
+	[https://www.braingle.com/brainteasers/codes/polybius.php](https://www.braingle.com/brainteasers/codes/polybius.php)
+
+* The Engima
+
+	[http://enigma.louisedade.co.uk/enigma.html](http://enigma.louisedade.co.uk/enigma.html),
+	[https://www.dcode.fr/enigma-machine-cipher](https://www.dcode.fr/enigma-machine-cipher)
+
+* AES ECB
+
+	The "blind SQL" of cryptography... leak the flag out by testing for characters just one byte away from the block length. 
+
+* 
+
+
+
+[steghide]: http://steghide.sourceforge.net/
+[snow]: http://www.darkside.com.au/snow/
+[cribdrag.py]: https://github.com/SpiderLabs/cribdrag