From 4d73d2abd53cbbbfabc4f71c9243251a18268774 Mon Sep 17 00:00:00 2001 From: Neil Smith Date: Thu, 30 Jul 2015 19:42:12 +0100 Subject: [PATCH] Added renamed previous cipher to autokey stream cipher; added non-autokeyed version --- SIGNED.md | 37 +-- stream-autokey-cipher.ipynb | 536 ++++++++++++++++++++++++++++++++++++ stream-cipher.ipynb | 223 ++++++++++----- 3 files changed, 710 insertions(+), 86 deletions(-) create mode 100644 stream-autokey-cipher.ipynb diff --git a/SIGNED.md b/SIGNED.md index fc950b9..7440f4d 100644 --- a/SIGNED.md +++ b/SIGNED.md @@ -3,19 +3,19 @@ -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 -iQIcBAABAgAGBQJVuKYhAAoJEJPB2e07Pgbqj/0P/0XBNZk/zEPZUJrD9EqppzQU -1m50EprHjaHFXBGGRMrExvpDgKljIR0KpId1wvmdkxmkQFASrr02+bs+YaEUp/Uv -7+5GmJm6mHQbNzxQevOJUB4YqEF7rBjZAlSEZsSITNa/GRux1C9jEM71IId6ZEYv -WIXU1lXgyue3tVk3jhv0lebzbyiea6wkFDdbMheQjDaY32g8Iyexo4qR4FWfUjmt -nVaENg30ZOhvpY5CTGBLfAW35uUZIko9j87AFpQo2YyBBnH391rThJ3e3AL3hFtX -fyVXFzbJDteYYAEVWET/p3vy+z4wKitJ1v8/o9kHYH4rPRehLGmNlKDFyeSGWI87 -R+m5ZXpZzXATz0Ydso9c1RCp1TgbB7byPyYDvyc92ND7jpdWJ/fH/ATTQggsRxx1 -88TMEMO77nXND4uQZcIRfdIQShUFtJy3F7PGmJ3SjtXHfvLAAqIFP3rwDeegRiiE -T3yWzQEdM3JpU929xzCInPkJf3hQHUcuJdT1HcZBfySDpxAfVnLr9KYqxj/dpgGT -YV+w8/D93hhnmArtgGSTSSsjTzJasQRo7/amEz/XiNn3408xJsGBghDXU80oyPfF -lAbN05d/coqSfam5DEzK/LVvG5n3ghSSAFQKnDqgf2qtE82lC9WHzn1YrzunDcZt -JQPSnePXSltPU//VuH8A -=tV49 +iQIcBAABAgAGBQJVunAIAAoJEJPB2e07Pgbq3JgP/ivF9DcWAEriSxKUZYaW/6lG +H7u8EKNom5nFGacZjB+/NhymSUQepTmI8YsGohVa/kVK1+R96afVegr/BFlZZ+6c +qOcF+J4g4Z2ASQjozZO2Zb2jWKXNTafn4wUL3Q5r5FTJ76HTLhmVwljQgWO1O3Te +OXqN5UvTD1HuzDoa8LmJ34pZSQ3zBHFFtZziF65jmiriki/8VedcHbRWQlJ9B7sX +t8y6w7fACqmjqN/knw/Fi5rQi2+dA9bEFo8bWD3ZeMwk/W0D33yfQ24tLcK93Tut +txLbFC34UrV5Ii4dirEDmxBvqIjjsBcowNF4HaUY9DExDQzbuNVoqDAGZ4wwIMKc +ZP7ApO3IsOv2krvtvHmhgClnP9ZOXsG33Jt3cH3tezLnsdP3fG27kpQlqUrX7hTm +3WLmKO0Tqpdy/G14rPRH85I9MBM/9eWxey0l13Z20JqXqh8MdTER2M9CfAz53cEX +D9l+sG0q0+Gwf6XY84IgpLOAGW3tWHIChHaSjE6pBPNdwo5HOnBF7ZFOwELqmj+z +b6IV3qwqxIAapc5LvE3iTOwriTGJORZHMIxoeolif7DNvopJpD1Kg0j40dcYE3ar +7v3as3T8d5/jvg9wMajoRZp6TIGsb1ISSbxtNSqe/oa8OL7JZAlmtRc6enfwiaY8 +UHl0BR35YZE4OQP6fVMi +=MWxD -----END PGP SIGNATURE----- ``` @@ -27,11 +27,12 @@ JQPSnePXSltPU//VuH8A #### Expect ``` -size exec file contents - ./ -384 .gitignore a93de2ae5c2a47a38599751d1f914566569dfa09dd1778e207117db6c71421dd -28564 nim-menace-learning.ipynb e13cd187b5785516ade802d71674ff682da7315da1a5ef82d2fe66d3ff8675bf -9766 stream-cipher.ipynb f02569456c91a825ea445c878b78341e83939444931affb15cded70c5c61d218 +size exec file contents + ./ +384 .gitignore a93de2ae5c2a47a38599751d1f914566569dfa09dd1778e207117db6c71421dd +28564 nim-menace-learning.ipynb e13cd187b5785516ade802d71674ff682da7315da1a5ef82d2fe66d3ff8675bf +27883 stream-autokey-cipher.ipynb dbd67c0f2cd1cc7470c3fc0fa17a1674ba69dab32068d8341be94891750173a6 +11503 stream-cipher.ipynb 8fa99343a3ce20abdf69645fe2baf0fe29551c619a77ff0556922884bbdc2658 ``` #### Ignore diff --git a/stream-autokey-cipher.ipynb b/stream-autokey-cipher.ipynb new file mode 100644 index 0000000..d102276 --- /dev/null +++ b/stream-autokey-cipher.ipynb @@ -0,0 +1,536 @@ +{ + "cells": [ + { + "cell_type": "code", + "execution_count": 1, + "metadata": { + "collapsed": true + }, + "outputs": [], + "source": [ + "import string\n", + "import itertools" + ] + }, + { + "cell_type": "code", + "execution_count": 2, + "metadata": { + "collapsed": true + }, + "outputs": [], + "source": [ + "def sanitised(text):\n", + " return ''.join(letter.lower() for letter in text if letter in string.ascii_letters)" + ] + }, + { + "cell_type": "code", + "execution_count": 3, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'thequickbrownfoxjumpedoverthelzydoga'" + ] + }, + "execution_count": 3, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "sanitised('The quick brown fox! jumped OVER the l\\a!z%y* dog....a')" + ] + }, + { + "cell_type": "code", + "execution_count": 4, + "metadata": { + "collapsed": false + }, + "outputs": [], + "source": [ + "def encipher_letter(previous, key, current):\n", + " new = (ord(previous) + ord(key) + ord(current) - 3 * ord('a')) % 26\n", + " return chr(new + ord('a'))" + ] + }, + { + "cell_type": "code", + "execution_count": 17, + "metadata": { + "collapsed": true + }, + "outputs": [], + "source": [ + "def decipher_letter(previous, key, current):\n", + " new = (ord(current) - ord(key) - ord(previous) + ord('a')) % 26\n", + " return chr(new + ord('a'))" + ] + }, + { + "cell_type": "code", + "execution_count": 6, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'a'" + ] + }, + "execution_count": 6, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "encipher_letter('a', 'a', 'a')" + ] + }, + { + "cell_type": "code", + "execution_count": 8, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'abcdefghijklmnopqrstuvwxyz'" + ] + }, + "execution_count": 8, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "''.join(encipher_letter('a', 'a', l) for l in string.ascii_lowercase)" + ] + }, + { + "cell_type": "code", + "execution_count": 9, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'cdefghijklmnopqrstuvwxyzab'" + ] + }, + "execution_count": 9, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "''.join(encipher_letter('b', 'b', l) for l in string.ascii_lowercase)" + ] + }, + { + "cell_type": "code", + "execution_count": 18, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'abcdefghijklmnopqrstuvwxyz'" + ] + }, + "execution_count": 18, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "''.join(decipher_letter('a', 'a', l) for l in string.ascii_lowercase)" + ] + }, + { + "cell_type": "code", + "execution_count": 21, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'yzabcdefghijklmnopqrstuvwx'" + ] + }, + "execution_count": 21, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "''.join(decipher_letter('b', 'b', l) for l in string.ascii_lowercase)" + ] + }, + { + "cell_type": "code", + "execution_count": 20, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'b'" + ] + }, + "execution_count": 20, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "decipher_letter('a', 'a', 'b')" + ] + }, + { + "cell_type": "code", + "execution_count": 23, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + 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+ ] + }, + "execution_count": 23, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "''.join(encipher_letter(k, p, l) \n", + " for l in string.ascii_lowercase \n", + " for k in string.ascii_lowercase \n", + " for p in string.ascii_lowercase)" + ] + }, + { + "cell_type": "code", + "execution_count": 24, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "[('a', 'a', 'a', 'a'),\n", + " ('a', 'b', 'a', 'b'),\n", + " ('a', 'c', 'a', 'c'),\n", + " ('a', 'd', 'a', 'd'),\n", + " ('a', 'e', 'a', 'e'),\n", + " ('a', 'f', 'a', 'f'),\n", + " ('a', 'g', 'a', 'g'),\n", + " ('a', 'h', 'a', 'h'),\n", + " ('a', 'i', 'a', 'i'),\n", + " ('a', 'j', 'a', 'j')]" + ] + }, + "execution_count": 24, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "encrypted = [(k, p, l, encipher_letter(k, p, l)) \n", + " for l in string.ascii_lowercase \n", + " for k in string.ascii_lowercase\n", + " for p in string.ascii_lowercase]\n", + "encrypted[:10]" + ] + }, + { + "cell_type": "code", + "execution_count": 25, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "True" + ] + }, + "execution_count": 25, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "all(l == decipher_letter(k, p, e) for k, l, p, e in encrypted)" + ] + }, + { + "cell_type": "code", + "execution_count": 39, + "metadata": { + "collapsed": true + }, + "outputs": [], + "source": [ + "def encipher_message(plaintext, keystring='a'):\n", + " key = itertools.cycle(keystring)\n", + " ciphertext = ''\n", + " previous = keystring[0]\n", + " for letter, keychar in zip(plaintext, key):\n", + " cipherletter = encipher_letter(previous, keychar, letter)\n", + " ciphertext += cipherletter\n", + " previous = cipherletter\n", + " # previous = letter\n", + " return ciphertext" + ] + }, + { + "cell_type": "code", + "execution_count": 40, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'hlnbk'" + ] + }, + "execution_count": 40, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "encipher_message('hello', 'aardvark')" + ] + }, + { + "cell_type": "code", + "execution_count": 41, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'nhijn'" + ] + }, + "execution_count": 41, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "encipher_message('hello', 'q')" + ] + }, + { + "cell_type": "code", + "execution_count": 42, + "metadata": { + "collapsed": true + }, + "outputs": [], + "source": [ + "def decipher_message(ciphertext, keystring='a'):\n", + " key = itertools.cycle(keystring)\n", + " plaintext = ''\n", + " previous = keystring[0]\n", + " for letter, keychar in zip(ciphertext, key):\n", + " plainletter = decipher_letter(previous, keychar, letter)\n", + " plaintext += plainletter\n", + " previous = letter\n", + " # previous = plainletter\n", + " return plaintext" + ] + }, + { + "cell_type": "code", + "execution_count": 43, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'hello'" + ] + }, + "execution_count": 43, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "decipher_message('hlnbk', 'aardvark')" + ] + }, + { + "cell_type": "code", + "execution_count": 44, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'hello'" + ] + }, + "execution_count": 44, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "decipher_message('nhijn', 'q')" + ] + }, + { + "cell_type": "code", + "execution_count": 45, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'hecoj'" + ] + }, + "execution_count": 45, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "decipher_message('hlnbk')" + ] + }, + { + "cell_type": "code", + "execution_count": 46, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'hlwhvjxlznbpdrfthvjxlznbpd'" + ] + }, + "execution_count": 46, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "encipher_message('helloooooooooooooooooooooo')" + ] + }, + { + "cell_type": "code", + "execution_count": 47, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'helloooooooooooooooooooooo'" + ] + }, + "execution_count": 47, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "decipher_message('hlwhvjxlznbpdrfthvjxlznbpd')" + ] + }, + { + "cell_type": "code", + "execution_count": 48, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'fdkknnnnnnnnnnnnnnnnnnnnnn'" + ] + }, + "execution_count": 48, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "decipher_message('hlwhvjxlznbpdrfthvjxlznbpd', 'b')" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], + "source": [] + } + ], + "metadata": { + "kernelspec": { + "display_name": "Python 3", + "language": "python", + "name": "python3" + }, + "language_info": { + "codemirror_mode": { + "name": "ipython", + "version": 3 + }, + "file_extension": ".py", + "mimetype": "text/x-python", + "name": "python", + "nbconvert_exporter": "python", + "pygments_lexer": "ipython3", + "version": "3.4.2" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} diff --git a/stream-cipher.ipynb b/stream-cipher.ipynb index 213eb83..21e9316 100644 --- a/stream-cipher.ipynb +++ b/stream-cipher.ipynb @@ -8,12 +8,13 @@ }, "outputs": [], "source": [ - "import string" + "import string\n", + "import itertools" ] }, { "cell_type": "code", - "execution_count": 40, + "execution_count": 6, "metadata": { "collapsed": true }, @@ -25,7 +26,7 @@ }, { "cell_type": "code", - "execution_count": 41, + "execution_count": 7, "metadata": { "collapsed": false }, @@ -36,7 +37,7 @@ "'thequickbrownfoxjumpedoverthelzydoga'" ] }, - "execution_count": 41, + "execution_count": 7, "metadata": {}, "output_type": "execute_result" } @@ -47,33 +48,33 @@ }, { "cell_type": "code", - "execution_count": 2, + "execution_count": 12, "metadata": { "collapsed": false }, "outputs": [], "source": [ - "def encipher_letter(previous, current):\n", - " new = (ord(previous) + ord(current) - 2 * ord('a')) % 26\n", + "def encipher_letter(key, current):\n", + " new = (ord(key) + ord(current) - 2 * ord('a')) % 26\n", " return chr(new + ord('a'))" ] }, { "cell_type": "code", - "execution_count": 15, + "execution_count": 9, "metadata": { "collapsed": true }, "outputs": [], "source": [ - "def decipher_letter(previous, current):\n", - " new = (ord(current) - ord(previous) - 2 * ord('a')) % 26\n", + "def decipher_letter(key, current):\n", + " new = (ord(current) - ord(key)) % 26\n", " return chr(new + ord('a'))" ] }, { "cell_type": "code", - "execution_count": 4, + "execution_count": 13, "metadata": { "collapsed": false }, @@ -84,7 +85,7 @@ "'a'" ] }, - "execution_count": 4, + "execution_count": 13, "metadata": {}, "output_type": "execute_result" } @@ -95,7 +96,7 @@ }, { "cell_type": "code", - "execution_count": 6, + "execution_count": 14, "metadata": { "collapsed": false }, @@ -106,7 +107,7 @@ "'abcdefghijklmnopqrstuvwxyz'" ] }, - "execution_count": 6, + "execution_count": 14, "metadata": {}, "output_type": "execute_result" } @@ -117,7 +118,7 @@ }, { "cell_type": "code", - "execution_count": 7, + "execution_count": 15, "metadata": { "collapsed": false }, @@ -128,7 +129,7 @@ "'bcdefghijklmnopqrstuvwxyza'" ] }, - "execution_count": 7, + "execution_count": 15, "metadata": {}, "output_type": "execute_result" } @@ -139,7 +140,7 @@ }, { "cell_type": "code", - "execution_count": 17, + "execution_count": 16, "metadata": { "collapsed": false }, @@ -150,7 +151,7 @@ "'abcdefghijklmnopqrstuvwxyz'" ] }, - "execution_count": 17, + "execution_count": 16, "metadata": {}, "output_type": "execute_result" } @@ -161,7 +162,7 @@ }, { "cell_type": "code", - "execution_count": 18, + "execution_count": 17, "metadata": { "collapsed": false }, @@ -169,29 +170,43 @@ { "data": { "text/plain": [ - "'b'" + "'zabcdefghijklmnopqrstuvwxy'" ] }, - "execution_count": 18, + "execution_count": 17, "metadata": {}, "output_type": "execute_result" } ], "source": [ - "decipher_letter('a', 'b')" + "''.join(decipher_letter('b', l) for l in string.ascii_lowercase)" ] }, { - "cell_type": "markdown", - "metadata": {}, + "cell_type": "code", + "execution_count": 18, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'b'" + ] + }, + "execution_count": 18, + "metadata": {}, + "output_type": "execute_result" + } + ], "source": [ - "e = (p + c) % 26\n", - "c = e - p" + "decipher_letter('a', 'b')" ] }, { "cell_type": "code", - "execution_count": 20, + "execution_count": 19, "metadata": { "collapsed": false }, @@ -202,18 +217,20 @@ "'abcdefghijklmnopqrstuvwxyzbcdefghijklmnopqrstuvwxyzacdefghijklmnopqrstuvwxyzabdefghijklmnopqrstuvwxyzabcefghijklmnopqrstuvwxyzabcdfghijklmnopqrstuvwxyzabcdeghijklmnopqrstuvwxyzabcdefhijklmnopqrstuvwxyzabcdefgijklmnopqrstuvwxyzabcdefghjklmnopqrstuvwxyzabcdefghiklmnopqrstuvwxyzabcdefghijlmnopqrstuvwxyzabcdefghijkmnopqrstuvwxyzabcdefghijklnopqrstuvwxyzabcdefghijklmopqrstuvwxyzabcdefghijklmnpqrstuvwxyzabcdefghijklmnoqrstuvwxyzabcdefghijklmnoprstuvwxyzabcdefghijklmnopqstuvwxyzabcdefghijklmnopqrtuvwxyzabcdefghijklmnopqrsuvwxyzabcdefghijklmnopqrstvwxyzabcdefghijklmnopqrstuwxyzabcdefghijklmnopqrstuvxyzabcdefghijklmnopqrstuvwyzabcdefghijklmnopqrstuvwxzabcdefghijklmnopqrstuvwxy'" ] }, - "execution_count": 20, + "execution_count": 19, "metadata": {}, "output_type": "execute_result" } ], "source": [ - "''.join(encipher_letter(k, l) for l in string.ascii_lowercase for k in string.ascii_lowercase)" + "''.join(encipher_letter(k, l) \n", + " for l in string.ascii_lowercase \n", + " for k in string.ascii_lowercase)" ] }, { "cell_type": "code", - "execution_count": 21, + "execution_count": 20, "metadata": { "collapsed": false }, @@ -233,19 +250,21 @@ " ('j', 'a', 'j')]" ] }, - "execution_count": 21, + "execution_count": 20, "metadata": {}, "output_type": "execute_result" } ], "source": [ - "encrypted = [(k, l, encipher_letter(k, l)) for l in string.ascii_lowercase for k in string.ascii_lowercase]\n", + "encrypted = [(k, l, encipher_letter(k, l)) \n", + " for l in string.ascii_lowercase \n", + " for k in string.ascii_lowercase]\n", "encrypted[:10]" ] }, { "cell_type": "code", - "execution_count": 22, + "execution_count": 21, "metadata": { "collapsed": false }, @@ -256,7 +275,7 @@ "True" ] }, - "execution_count": 22, + "execution_count": 21, "metadata": {}, "output_type": "execute_result" } @@ -267,17 +286,18 @@ }, { "cell_type": "code", - "execution_count": 55, + "execution_count": 32, "metadata": { "collapsed": true }, "outputs": [], "source": [ - "def encipher_message(plaintext, key='a'):\n", + "def encipher_message(plaintext, keystring='key'):\n", + " key = itertools.cycle(keystring)\n", " ciphertext = ''\n", - " previous = key\n", - " for letter in plaintext:\n", - " cipherletter = encipher_letter(previous, letter)\n", + " previous = keystring[0]\n", + " for letter, keychar in zip(plaintext, key):\n", + " cipherletter = encipher_letter(keychar, letter)\n", " ciphertext += cipherletter\n", " previous = cipherletter\n", " # previous = letter\n", @@ -286,7 +306,7 @@ }, { "cell_type": "code", - "execution_count": 56, + "execution_count": 23, "metadata": { "collapsed": false }, @@ -294,21 +314,21 @@ { "data": { "text/plain": [ - "'hlwhv'" + "'hecoj'" ] }, - "execution_count": 56, + "execution_count": 23, "metadata": {}, "output_type": "execute_result" } ], "source": [ - "encipher_message('hello')" + "encipher_message('hello', 'aardvark')" ] }, { "cell_type": "code", - "execution_count": 57, + "execution_count": 24, "metadata": { "collapsed": false }, @@ -316,10 +336,10 @@ { "data": { "text/plain": [ - "'xbmxl'" + "'xubbe'" ] }, - "execution_count": 57, + "execution_count": 24, "metadata": {}, "output_type": "execute_result" } @@ -330,17 +350,18 @@ }, { "cell_type": "code", - "execution_count": 54, + "execution_count": 33, "metadata": { "collapsed": true }, "outputs": [], "source": [ - "def decipher_message(ciphertext, key='a'):\n", + "def decipher_message(ciphertext, keystring='key'):\n", + " key = itertools.cycle(keystring)\n", " plaintext = ''\n", - " previous = key\n", - " for letter in ciphertext:\n", - " plainletter = decipher_letter(previous, letter)\n", + " previous = keystring[0]\n", + " for letter, keychar in zip(ciphertext, key):\n", + " plainletter = decipher_letter(keychar, letter)\n", " plaintext += plainletter\n", " previous = letter\n", " # previous = plainletter\n", @@ -349,7 +370,7 @@ }, { "cell_type": "code", - "execution_count": 58, + "execution_count": 27, "metadata": { "collapsed": false }, @@ -360,18 +381,18 @@ "'hello'" ] }, - "execution_count": 58, + "execution_count": 27, "metadata": {}, "output_type": "execute_result" } ], "source": [ - "decipher_message('hlwhv')" + "decipher_message('hecoj', 'aardvark')" ] }, { "cell_type": "code", - "execution_count": 59, + "execution_count": 28, "metadata": { "collapsed": false }, @@ -379,21 +400,21 @@ { "data": { "text/plain": [ - "'xello'" + "'hello'" ] }, - "execution_count": 59, + "execution_count": 28, "metadata": {}, "output_type": "execute_result" } ], "source": [ - "decipher_message('xbmxl')" + "decipher_message('xubbe', 'q')" ] }, { "cell_type": "code", - "execution_count": 60, + "execution_count": 31, "metadata": { "collapsed": false }, @@ -401,21 +422,21 @@ { "data": { "text/plain": [ - "'hello'" + "'romyt'" ] }, - "execution_count": 60, + "execution_count": 31, "metadata": {}, "output_type": "execute_result" } ], "source": [ - "decipher_message('xbmxl', 'q')" + "decipher_message('hecoj', 'q')" ] }, { "cell_type": "code", - "execution_count": 61, + "execution_count": 34, "metadata": { "collapsed": false }, @@ -423,10 +444,10 @@ { "data": { "text/plain": [ - "'hlwhvjxlznbpdrfthvjxlznbpd'" + "'rijvsmysmysmysmysmysmysmys'" ] }, - "execution_count": 61, + "execution_count": 34, "metadata": {}, "output_type": "execute_result" } @@ -437,7 +458,7 @@ }, { "cell_type": "code", - "execution_count": 62, + "execution_count": 35, "metadata": { "collapsed": false }, @@ -448,13 +469,79 @@ "'helloooooooooooooooooooooo'" ] }, - "execution_count": 62, + "execution_count": 35, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "decipher_message('rijvsmysmysmysmysmysmysmys')" + ] + }, + { + "cell_type": "code", + "execution_count": 36, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'qhiurlxrlxrlxrlxrlxrlxrlxr'" + ] + }, + "execution_count": 36, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "decipher_message('rijvsmysmysmysmysmysmysmys', 'b')" + ] + }, + { + "cell_type": "code", + "execution_count": 37, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'dlghpjalicxktzjayi'" + ] + }, + "execution_count": 37, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "encipher_message(sanitised('This is a test message'), 'keyphrase')" + ] + }, + { + "cell_type": "code", + "execution_count": 38, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "data": { + "text/plain": [ + "'thisisatestmessage'" + ] + }, + "execution_count": 38, "metadata": {}, "output_type": "execute_result" } ], "source": [ - "decipher_message('hlwhvjxlznbpdrfthvjxlznbpd')" + "decipher_message('dlghpjalicxktzjayi', 'keyphrase')" ] }, { -- 2.34.1