--- /dev/null
+{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:c4879f550d49d776eff31ee9f3296756aab1dcd81e1e5aad61ade46d9b29600d"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "from cipher import *"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "railfence_encipherl('hellothere', 3)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 25,
+ "text": [
+ "'horeltee lh '"
+ ]
+ }
+ ],
+ "prompt_number": 25
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "message = 'hellothere'\n",
+ "height = 2"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 169
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "sections = chunks(message, (height - 1) * 2, fillvalue='!')\n",
+ "sections"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 170,
+ "text": [
+ "['he', 'll', 'ot', 'he', 're']"
+ ]
+ }
+ ],
+ "prompt_number": 170
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "rows = [s[0] for s in sections]\n",
+ "rows"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 171,
+ "text": [
+ "['h', 'l', 'o', 'h', 'r']"
+ ]
+ }
+ ],
+ "prompt_number": 171
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "for r in range(1, height - 1):\n",
+ " rows += [s[r] + s[-r] for s in sections]\n",
+ "rows"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 172,
+ "text": [
+ "['h', 'l', 'o', 'h', 'r']"
+ ]
+ }
+ ],
+ "prompt_number": 172
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "rows += [s[height - 1] for s in sections]\n",
+ "rows"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 173,
+ "text": [
+ "['h', 'l', 'o', 'h', 'r', 'e', 'l', 't', 'e', 'e']"
+ ]
+ }
+ ],
+ "prompt_number": 173
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "ciphertext = ''.join(rows)\n",
+ "ciphertext"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 174,
+ "text": [
+ "'hlohreltee'"
+ ]
+ }
+ ],
+ "prompt_number": 174
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "def railfence_encipherl(message, height, fillvalue=' '):\n",
+ " \"\"\"Railfence cipher\n",
+ " \"\"\"\n",
+ " sections = chunks(message, (height - 1) * 2, fillvalue=fillvalue)\n",
+ " # Add the top row\n",
+ " rows = [s[0] for s in sections]\n",
+ " # process the middle rows of the grid\n",
+ " for r in range(1, height - 1):\n",
+ " rows += [s[r] + s[-r] for s in sections]\n",
+ " # process the bottom row\n",
+ " rows += [s[height - 1] for s in sections]\n",
+ " return ''.join(rows)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 24
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "ciphertext = railfence_encipherl(message, height, fillvalue='!')\n",
+ "ciphertext"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 175,
+ "text": [
+ "'hlohreltee'"
+ ]
+ }
+ ],
+ "prompt_number": 175
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "len(ciphertext)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 176,
+ "text": [
+ "10"
+ ]
+ }
+ ],
+ "prompt_number": 176
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "n_secs = len(ciphertext) // ((height - 1) * 2)\n",
+ "n_secs"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 177,
+ "text": [
+ "5"
+ ]
+ }
+ ],
+ "prompt_number": 177
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "ciphertext[:5]"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 109,
+ "text": [
+ "'hhaes'"
+ ]
+ }
+ ],
+ "prompt_number": 109
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "ciphertext[5:15]"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 110,
+ "text": [
+ "'etevshae!!'"
+ ]
+ }
+ ],
+ "prompt_number": 110
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "ciphertext[15:25]"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 111,
+ "text": [
+ "'lorateri!!'"
+ ]
+ }
+ ],
+ "prompt_number": 111
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "ciphertext[25:]"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 112,
+ "text": [
+ "'lemt!'"
+ ]
+ }
+ ],
+ "prompt_number": 112
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "downrows = [ciphertext[:n_secs]]\n",
+ "uprows = []\n",
+ "downrows, uprows"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 180,
+ "text": [
+ "(['hlohr'], [])"
+ ]
+ }
+ ],
+ "prompt_number": 180
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "for r in range(1, height, 2):\n",
+ " midrow = ciphertext[r * n_secs:(r+2)*n_secs]\n",
+ " downrows += [''.join([midrow[i] for i in range(0, len(midrow), 2)])]\n",
+ " uprows = [''.join([midrow[i] for i in range(1, len(midrow), 2)])] + uprows\n",
+ "downrows, uprows"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 179,
+ "text": [
+ "(['hlohr', 'ete'], ['le'])"
+ ]
+ }
+ ],
+ "prompt_number": 179
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "downrows += [ciphertext[-n_secs:]]\n",
+ "downrows, uprows"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 181,
+ "text": [
+ "(['hlohr', 'eltee'], [])"
+ ]
+ }
+ ],
+ "prompt_number": 181
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "rows = downrows + uprows\n",
+ "rows"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 182,
+ "text": [
+ "['hlohr', 'eltee']"
+ ]
+ }
+ ],
+ "prompt_number": 182
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "midrow = rows[1]\n",
+ "midrow"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 64,
+ "text": [
+ "'elteevsmhate!!'"
+ ]
+ }
+ ],
+ "prompt_number": 64
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "mid_down = ''.join([midrow[i] for i in range(0, len(midrow), 2)])\n",
+ "mid_down"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 65,
+ "text": [
+ "'etesht!'"
+ ]
+ }
+ ],
+ "prompt_number": 65
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "mid_up = ''.join([midrow[i] for i in range(1, len(midrow), 2)])\n",
+ "mid_up"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 66,
+ "text": [
+ "'levmae!'"
+ ]
+ }
+ ],
+ "prompt_number": 66
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "rows = downrows + uprows\n",
+ "rows"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 139,
+ "text": [
+ "['hhaesspfoilcs',\n",
+ " 'eesataitrnfi!',\n",
+ " 'lrtrhleetgep!',\n",
+ " 'lemtiocxernh!',\n",
+ " 'oaeisnetsace!',\n",
+ " 'tvheigoftier!']"
+ ]
+ }
+ ],
+ "prompt_number": 139
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "''.join(letter for section in zip(*rows) for letter in section)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 183,
+ "text": [
+ "'hellothere'"
+ ]
+ }
+ ],
+ "prompt_number": 183
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "def railfence_decipherl(message, height):\n",
+ " n_secs = len(message) // ((height - 1) * 2)\n",
+ " downrows = [message[:n_secs]]\n",
+ " uprows = []\n",
+ " for r in range(height-2):\n",
+ " midrow = ciphertext[(2 * r + 1) * n_secs:(2 * r + 1) * n_secs + n_secs * 2]\n",
+ " downrows += [''.join([midrow[i] for i in range(0, len(midrow), 2)])]\n",
+ " uprows = [''.join([midrow[i] for i in range(1, len(midrow), 2)])] + uprows\n",
+ " downrows += [message[-n_secs:]]\n",
+ " rows = downrows + uprows\n",
+ " return ''.join(letter for section in zip(*rows) for letter in section)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 249
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "ciphertext"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 154,
+ "text": [
+ "'hhaesetevshae!!lorateri!!lemt!'"
+ ]
+ }
+ ],
+ "prompt_number": 154
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "railfence_decipherl(ciphertext, 4)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 155,
+ "text": [
+ "''"
+ ]
+ }
+ ],
+ "prompt_number": 155
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "plaintext = sanitise('hello there avast me hearties this is a long piece of text for testing railfence ciphers')\n",
+ "plaintext"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 250,
+ "text": [
+ "'hellothereavastmeheartiesthisisalongpieceoftextfortestingrailfenceciphers'"
+ ]
+ }
+ ],
+ "prompt_number": 250
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "ciphertext = railfence_encipherl(plaintext, height, fillvalue='!')\n",
+ "ciphertext"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 163,
+ "text": [
+ "'hhaesspfoilcsetevshaetiagiotfrtnifeir!!loraterihslneeettsgaecpe!!lemtiocxernh!'"
+ ]
+ }
+ ],
+ "prompt_number": 163
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "railfence_decipherl(ciphertext, height)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 164,
+ "text": [
+ "'hellothereavastmeheartiesthisisalongpieceoftextfortestingrailfenceciphers!!!!!'"
+ ]
+ }
+ ],
+ "prompt_number": 164
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "railfence_encipherl('hellothere', 2)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 186,
+ "text": [
+ "'hlohreltee'"
+ ]
+ }
+ ],
+ "prompt_number": 186
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "railfence_decipherl('hlohreltee', 2)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 187,
+ "text": [
+ "'hellothere'"
+ ]
+ }
+ ],
+ "prompt_number": 187
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "[i for i in range(1, 2, 2)]"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 184,
+ "text": [
+ "[1]"
+ ]
+ }
+ ],
+ "prompt_number": 184
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "railfence_encipherl('hellothereavastmeheartiesthisisalongpieceoftextfortestingrailfenceciphers', 10, fillvalue='!')"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 265,
+ "text": [
+ "'hepisehagitnr!!lernesge!!lmtocerh!!otiletap!!tseaorii!!hassfolc!!evtitffe!!rahsetec!!eixn!'"
+ ]
+ }
+ ],
+ "prompt_number": 265
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "railfence_decipherl('horaersslpeeosglcpselteevsmhatetiiaogicotxfretnrifneihr!!lhateihsnefttiaece!', 3)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 191,
+ "text": [
+ "'hellothereavastmeheartiesthisisalongpieceoftextfortestingrailfenceciphers!!!'"
+ ]
+ }
+ ],
+ "prompt_number": 191
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "railfence_encipherl('hellothereavastmeheartiesthisisalongpieceoftextfortestingrailfenceciphers', 4, fillvalue='!')"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 240,
+ "text": [
+ "'hhaesspfoilcsetevshaetiagiotfrtnifeir!!loraterihslneeettsgaecpe!!lemtiocxernh!'"
+ ]
+ }
+ ],
+ "prompt_number": 240
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "railfence_decipherl('hhaesspfoilcsetevshaetiagiotfrtnifeir!!loraterihslneeettsgaecpe!!lemtiocxernh!', 4)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 241,
+ "text": [
+ "'hmelfhhetettaaimaoecetcosfei!rsn!olrpntcvefrsxa!o!teilihirgaltintecixhehsst!in'"
+ ]
+ }
+ ],
+ "prompt_number": 241
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "railfence_encipherl('hellothereavastmeheartiesthisisalongpieceoftextfortestingrailfenceciphers', 5, fillvalue='!')"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 238,
+ "text": [
+ "'hresleogcseeemhetaocofrnrner!!lhateihsnefttiaece!!ltvsatiigitxetifih!!oarspeslp!'"
+ ]
+ }
+ ],
+ "prompt_number": 238
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "railfence_decipherl('hresleogcseeemhetaocofrnrner!!lhateihsnefttiaece!!ltvsatiigitxetifih!!oarspeslp!', 5)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 239,
+ "text": [
+ "'hellothereavastmeheartiesthisisalongpieceoftextfortestingrailfenceciphers!!!!!!!'"
+ ]
+ }
+ ],
+ "prompt_number": 239
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "len(railfence_encipherl('hellothereavastmeheartiesthisisalongpieceoftextfortestingrailfenceciphers', 5, fillvalue='!'))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 199,
+ "text": [
+ "80"
+ ]
+ }
+ ],
+ "prompt_number": 199
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "ciphertext = 'horaersslpeeosglcpselteevsmhatetiiaogicotxfretnrifneihr!!lhateihsnefttiaece!'\n",
+ "height=3"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 226
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "ciphertext = 'hhaesspfoilcsetevshaetiagiotfrtnifeir!!loraterihslneeettsgaecpe!!lemtiocxernh!'\n",
+ "height=4"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 242
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "ciphertext = 'hresleogcseeemhetaocofrnrner!!lhateihsnefttiaece!!ltvsatiigitxetifih!!oarspeslp!'\n",
+ "height=5"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 226
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "n_secs = len(ciphertext) // ((height - 1) * 2)\n",
+ "n_secs"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 243,
+ "text": [
+ "13"
+ ]
+ }
+ ],
+ "prompt_number": 243
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "downrows = [ciphertext[:n_secs]]\n",
+ "uprows = []\n",
+ "downrows, uprows"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 244,
+ "text": [
+ "(['hhaesspfoilcs'], [])"
+ ]
+ }
+ ],
+ "prompt_number": 244
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "for r in range(height-2):\n",
+ " print('From', (2 * r + 1) * n_secs, 'to', (2 * r + 1) * n_secs + n_secs * 2)\n",
+ " midrow = ciphertext[(2 * r + 1) * n_secs:(2 * r + 1) * n_secs + n_secs * 2]\n",
+ " downrows += [''.join([midrow[i] for i in range(0, len(midrow), 2)])]\n",
+ " uprows = [''.join([midrow[i] for i in range(1, len(midrow), 2)])] + uprows\n",
+ "downrows, uprows"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "From 13 to 39\n",
+ "From 39 to 65\n"
+ ]
+ },
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 245,
+ "text": [
+ "(['hhaesspfoilcs', 'eesataitrnfi!', 'lrtrhleetgep!'],\n",
+ " ['oaeisnetsace!', 'tvheigoftier!'])"
+ ]
+ }
+ ],
+ "prompt_number": 245
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "downrows += [ciphertext[-n_secs:]]\n",
+ "downrows, uprows"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 246,
+ "text": [
+ "(['hhaesspfoilcs', 'eesataitrnfi!', 'lrtrhleetgep!', 'lemtiocxernh!'],\n",
+ " ['oaeisnetsace!', 'tvheigoftier!'])"
+ ]
+ }
+ ],
+ "prompt_number": 246
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "rows = downrows + uprows"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 247
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "''.join(letter for section in zip(*rows) for letter in section)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 248,
+ "text": [
+ "'hellothereavastmeheartiesthisisalongpieceoftextfortestingrailfenceciphers!!!!!'"
+ ]
+ }
+ ],
+ "prompt_number": 248
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "[i for i in range(0)]"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 236,
+ "text": [
+ "[]"
+ ]
+ }
+ ],
+ "prompt_number": 236
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "height = 3\n",
+ "ciphertext = railfence_encipherl(plaintext, height, fillvalue=' ')\n",
+ "result = railfence_decipherl(ciphertext, height).strip()\n",
+ "result == plaintext"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 270,
+ "text": [
+ "True"
+ ]
+ }
+ ],
+ "prompt_number": 270
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "ciphertext"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 271,
+ "text": [
+ "'horaersslpeeosglcpselteevsmhatetiiaogicotxfretnrifneihr lhateihsnefttiaece '"
+ ]
+ }
+ ],
+ "prompt_number": 271
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [],
+ "language": "python",
+ "metadata": {},
+ "outputs": []
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
\ No newline at end of file
projects / cipher-tools.git / blobdiff