some small fixes

Cryptography/README.md

@@ -1,3 +1,27 @@
 # TOOLS:
 
-- https://www.cryptool.org/en/cryptool1-en
+- https://www.cryptool.org/en/cryptool1-en
+
+- frequency analyses online: 
+
+
+## ROT13
+
+In the command line
+```
+VAR=$(cat data.txt)
+echo "$VAR"
+alias rot13="tr A-Za-z N-ZA-Mn-za-m"
+echo "$VAR" | rot13
+```
+----
+
+
+In Python we can use: ```"YRIRY GJB CNFFJBEQ EBGGRA".decode(encoding="ROT13")```
+https://docs.python.org/2/library/codecs.html#codec-base-classes
+
+---
+
+Online: 
+
+http://www.xarg.org/tools/caesar-cipher/

Cryptography/ROT_13_EASY.md~

@@ -1,10 +0,0 @@
-```
-VAR=$(cat data.txt)
-echo "$VAR"
-alias rot13="tr A-Za-z N-ZA-Mn-za-m"
-echo "$VAR" | rot13
-```
-
-
-In Python we can use: ```"YRIRY GJB CNFFJBEQ EBGGRA".decode(encoding="ROT13")```
-https://docs.python.org/2/library/codecs.html#codec-base-classes

Cryptography/RotationCiphers/brute_force_rotation.py

@@ -0,0 +1,17 @@
+#!/usr/bin/python
+import sys
+
+CIPHER = "OMQEMDUEQMEK"
+LETTERS = list("ABCDEFGHIJKLMNOPQRSTUVWXYZ")
+CIPHER = ""
+shift = 1
+
+while i < len(LETTERS):
+ for c in CIPHER:
+  if c in LETTERS:
+   CIPHER += LETTERS[(LETTERS.index(c)+shift)%(len(LETTERS))]
+ print("Shift used: " + str(shift))
+ print("Ciphertext: " + CIPHER)
+ print("CIPHER: " + CIPHER)
+ shift = shift + 1
+ CIPHER = ""