From: Neil Smith <neil.git@njae.me.uk>
Date: Fri, 10 Nov 2017 12:51:38 +0000 (+0000)
Subject: Reimplementing Beaufort ciphers
X-Git-Url: https://git.njae.me.uk/?p=cipher-tools.git;a=commitdiff_plain;h=f1a99f2d70045b6fd19ded876c9a7584099b0e18

Reimplementing Beaufort ciphers
---

diff --git a/2017/2017-challenge5.ipynb b/2017/2017-challenge5.ipynb
index aaee5b6..3160653 100644
--- a/2017/2017-challenge5.ipynb
+++ b/2017/2017-challenge5.ipynb
@@ -506,7 +506,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 34,
+   "execution_count": 3,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -535,7 +535,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 73,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [
     {
@@ -544,7 +544,7 @@
        "1577"
       ]
      },
-     "execution_count": 73,
+     "execution_count": 4,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -555,7 +555,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 77,
+   "execution_count": 5,
    "metadata": {},
    "outputs": [
     {
@@ -564,7 +564,7 @@
        "26"
       ]
      },
-     "execution_count": 77,
+     "execution_count": 5,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -575,7 +575,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 35,
+   "execution_count": 6,
    "metadata": {},
    "outputs": [
     {
@@ -598,8 +598,8 @@
        " ('u', 38),\n",
        " ('l', 38),\n",
        " ('k', 35),\n",
-       " ('c', 34),\n",
        " ('b', 34),\n",
+       " ('c', 34),\n",
        " ('t', 33),\n",
        " ('z', 33),\n",
        " ('q', 32),\n",
@@ -609,7 +609,7 @@
        " ('d', 22)]"
       ]
      },
-     "execution_count": 35,
+     "execution_count": 6,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -620,7 +620,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 81,
+   "execution_count": 7,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -629,7 +629,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 83,
+   "execution_count": 8,
    "metadata": {},
    "outputs": [
     {
@@ -638,7 +638,7 @@
        "[('i', 'n'), ('n', 'o'), ('o', 'o'), ('o', 'a'), ('a', 'd')]"
       ]
      },
-     "execution_count": 83,
+     "execution_count": 8,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -649,7 +649,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 85,
+   "execution_count": 9,
    "metadata": {},
    "outputs": [
     {
@@ -658,7 +658,7 @@
        "('fwruffnquevmp', -1750.4576000271347)"
       ]
      },
-     "execution_count": 85,
+     "execution_count": 9,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -670,7 +670,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 87,
+   "execution_count": 10,
    "metadata": {},
    "outputs": [
     {
@@ -679,7 +679,7 @@
        "'nieyqmhcenwlqvchdporosweiohtsshreoihpsvrvusdcostmjezkdeytdhrtasupknropbklngeutgnssthjhhnowgbdwvucncdvofhbdltfpvobiuicirayodpwkpoutibtgcenuhpwachchnbrjydhsfvhqszeuvdcpswatvzmxhsiigkobvcagqcdikfstrvkfggbdkvcvstuvufienwiniasbcecmvdwemkwgtnsyjridowjamhuhnrvxssgewikqxpxhashvwvteulpavioctweavlhtikkkximoikdloikrwswfiojrynulrsgtoktknqcporlruoigivdpeddhrntdmrnucnrioiuetpdnftaipjrewjqtercxzvydhiswrtrneonknnfsyrifcdhedoweptjrechehcptdcehirohbcpniloorntrrrtohgeoandszehilxywfqkrgnphglvcojfbetcietpqmfetkalnahiwixdppersmrihrctseahkhtifbokasoozrjgvvkehjsufarunbrtiswzdmriwcrovhdsdeihdteiiustmjupvkhdiisibjloyrdpyxkusdlwfpsehvevdoiudppehzgvcewnhifrvkfggbdkbidptartnotloihpseehrdipeotmlwbcousicucctsktsrlritcanhpdmrehuinioiuuwirsxtanvjshfwyrkacfihfctdipytegvprdowhfldhycrqhfctswdbnagevitctsufsrofoccprycjgnifeikrthnowgcedfedjwiisdtihszeecfvlwjqgehoeicssaqflthagmncpvvifnreneoiioiulytddhuhkrtzsdpevphodehkctsvfhltophksiepsgcohnrnuseajettlhdwhiepjwcenbtbuecihpijncohouidiqjikpovimvsrfridohvchdporhrmhlpnikpacvjiswwgszeyxrcpragclkvxbporlruoigoviferifridicrskiporsyypwgprszenephnicczvttucvqesuiivqleesvfrhcfgchuswrocjslotcnxtiiswkoieatruninitradpaortylcouoahdpehgukcvlrmrafrntaovetrxvyinpenvniquglltisxgy'"
       ]
      },
-     "execution_count": 87,
+     "execution_count": 10,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -690,7 +690,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 88,
+   "execution_count": 11,
    "metadata": {},
    "outputs": [
     {
@@ -699,7 +699,7 @@
        "('vejgvvnkgwfol', -1750.4576000271347)"
       ]
      },
-     "execution_count": 88,
+     "execution_count": 11,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -711,7 +711,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 89,
+   "execution_count": 12,
    "metadata": {},
    "outputs": [
     {
@@ -720,7 +720,7 @@
        "'nieyqmhcenwlqvchdporosweiohtsshreoihpsvrvusdcostmjezkdeytdhrtasupknropbklngeutgnssthjhhnowgbdwvucncdvofhbdltfpvobiuicirayodpwkpoutibtgcenuhpwachchnbrjydhsfvhqszeuvdcpswatvzmxhsiigkobvcagqcdikfstrvkfggbdkvcvstuvufienwiniasbcecmvdwemkwgtnsyjridowjamhuhnrvxssgewikqxpxhashvwvteulpavioctweavlhtikkkximoikdloikrwswfiojrynulrsgtoktknqcporlruoigivdpeddhrntdmrnucnrioiuetpdnftaipjrewjqtercxzvydhiswrtrneonknnfsyrifcdhedoweptjrechehcptdcehirohbcpniloorntrrrtohgeoandszehilxywfqkrgnphglvcojfbetcietpqmfetkalnahiwixdppersmrihrctseahkhtifbokasoozrjgvvkehjsufarunbrtiswzdmriwcrovhdsdeihdteiiustmjupvkhdiisibjloyrdpyxkusdlwfpsehvevdoiudppehzgvcewnhifrvkfggbdkbidptartnotloihpseehrdipeotmlwbcousicucctsktsrlritcanhpdmrehuinioiuuwirsxtanvjshfwyrkacfihfctdipytegvprdowhfldhycrqhfctswdbnagevitctsufsrofoccprycjgnifeikrthnowgcedfedjwiisdtihszeecfvlwjqgehoeicssaqflthagmncpvvifnreneoiioiulytddhuhkrtzsdpevphodehkctsvfhltophksiepsgcohnrnuseajettlhdwhiepjwcenbtbuecihpijncohouidiqjikpovimvsrfridohvchdporhrmhlpnikpacvjiswwgszeyxrcpragclkvxbporlruoigoviferifridicrskiporsyypwgprszenephnicczvttucvqesuiivqleesvfrhcfgchuswrocjslotcnxtiiswkoieatruninitradpaortylcouoahdpehgukcvlrmrafrntaovetrxvyinpenvniquglltisxgy'"
       ]
      },
-     "execution_count": 89,
+     "execution_count": 12,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -731,7 +731,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 94,
+   "execution_count": 13,
    "metadata": {},
    "outputs": [
     {
@@ -740,7 +740,7 @@
        "'a'"
       ]
      },
-     "execution_count": 94,
+     "execution_count": 13,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -751,7 +751,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 95,
+   "execution_count": 14,
    "metadata": {},
    "outputs": [
     {
@@ -760,7 +760,7 @@
        "'zyxwvutsrqponmlkjihgfedcba'"
       ]
      },
-     "execution_count": 95,
+     "execution_count": 14,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -771,7 +771,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 97,
+   "execution_count": 15,
    "metadata": {},
    "outputs": [
     {
@@ -780,7 +780,7 @@
        "'hveheifhbiicuzbbcfgvvnzafwnkqnndivxopvpdionrsyrmjvjlkaehbrfsmvmtvkqrrftcyspatroqqnbndcyiqretamkaszhcaqidtaxmpfrvenkfimmihgrxnvgqtrmcpzsqzpygininbbstddlcomipnnqgqargdgmrkbijtxnubxpuzjzbizesjbvqmutztdzotjzktjvraioamqznxiwnstbedizjnbjurebqqhldegrzvnynjbsdzprnparcknlqxnmryaisrqjxquzevdcijkzsbmmkczinszckaxrmkvnnzzfwlmksajvrzcqdrkqsdfgvyobqfemifqqrjcoilkydqodhdevxbauvrqdmumxaorieubzrdxvrlcowvodkrsqgzzsizvmdvddrnigrzayrlmednqfhqcblgnvrrntkusntzwdqpoddtvypazkhaqgqneyixiiukmcsfngyktqeftzpdmqtupjzjrkdxsunenxybyvqmqtdmfsdcmjkntbmmplvvvmzwvmzzzzcfymmtfumostdtbnzfkydvmddgrccdbjcnapbmmsrmjvtvztbcmmubemtzmdathxksrckiivczbkqzjvxbbyvqwjzzsinsowitztdzotjzenbyrumpsgbbvxopvgqwrcmfivmjtrjsponmsshdcmdrcmxombkjsopkydzblmhevxbkrcdllmuhranozrmdtidpmfedcbfvwkezzfvgrzxizrwkddefedcmrhtqizqzeqdcmtfcmuagskuoxceehvdbmkvqyiqreszfaqrdnxnmkrmwqgqqkekkieuozbrqmkrnvoizbwizihkukawixdzvbgmevxbtprrablnkvqgdbygzobrrqfzdcmsfnsprfncrxrpvespbsdhsrbvvjrbsbcynefqmilghcpeaqkbygwexspbramjbpmwdvgiatzcveonbzdzbbcfgvcojxcvhvyqusraxdireceehxdkuovylzkilefgvyobqfegiaaqdeeonbfidlyxfgvrhxprefmqgqhiuyiwlivipmasrtbdkfcznxbqcreoocieswonydyhwdtzrsqlmmmunvhwjkbmosmheqovbykgmphjsyprvxkvqwclksryojnnfdqpfgziqoyjpchoeszhetlptcrmllzw'"
       ]
      },
-     "execution_count": 97,
+     "execution_count": 15,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -792,7 +792,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 98,
+   "execution_count": 16,
    "metadata": {},
    "outputs": [
     {
@@ -801,7 +801,7 @@
        "('zixzmzrnkvirr', -1506.8637359274674)"
       ]
      },
-     "execution_count": 98,
+     "execution_count": 16,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -813,7 +813,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 99,
+   "execution_count": 17,
    "metadata": {},
    "outputs": [
     {
@@ -822,7 +822,7 @@
        "'inhisjournaldatedtheidesofoctoberintheyearoftheconsulshipsofcaeceliustulliuscapitopomponianusplotiusfirmusandgaiuscorneliusgallicanusagricolawrotethemysteryofthebattleatcamulodonumisatlastsolvedcalgacusmaybeabarbariannowbuthewasaromancitizenthenwhobetrayedusallforloveofabarbarianithastakenallmyskillsasaleaderofmentokeephimalivethelegionnairesspendtheireveningsdesigningnewandcruelwaystoexecutehiminrevengefortheshamehebroughtuponusbuthislifeispreciousitistheonlycardlefttoplayinoursearchforsalvationandthereturnofthestolenaquilaeifwecanalsorecoverthecodexthenperhapsitslosscanbeconcealedandourliveswillbesparedreleasingtheromantraitorcalgacusmusthavestuckintheproudagricolasthroatbuthemadeapactwiththeremainingcaledoniiandtravellednorthtoexchangetheprisonerfortheaquilaeandthecodexbutthecunningcaledoniantribesmansetanothertrapandpresentedagricolawithaforgerycunninglyassembledwithpagesfromthebooksstolenwhenthetriberansackedmonsgraupiusfortoolongthesonsofromehadunderestimatedthepeopleinbritanniaandwhiletheaquilaofthelegionhadbeenrestoredbytheexchangetheirhonourwasnotagricolafacedareturntoromehumiliationandalmostcertaindeaththesixthchapterofmytaleofwoeisguardedbylightningbullandoak'"
       ]
      },
-     "execution_count": 99,
+     "execution_count": 17,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -831,6 +831,26 @@
     "vigenere_decipher(rscb, kb)"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'arcanaimperii'"
+      ]
+     },
+     "execution_count": 18,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "cat(unpos(25 - pos(l)) for l in kb)"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 100,
@@ -881,6 +901,79 @@
    "source": [
     "open('5b.plaintext', 'w').write('\\n'.join(tpack(segment(vigenere_decipher(rscb, kb)))))"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 21,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def b2_encipher(message, keyword):\n",
+    "    \"\"\"Vigenere encipher\n",
+    "\n",
+    "    >>> vigenere_encipher('hello', 'abc')\n",
+    "    'hfnlp'\n",
+    "    \"\"\"\n",
+    "    shifts = [pos(l) for l in sanitise(keyword)]\n",
+    "    pairs = zip(message, cycle(shifts))\n",
+    "    return cat([unpos(k - pos(l)) for l, k in pairs])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 22,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'sevsvrusyrrxfayyxuteemazudmpjmmwr'"
+      ]
+     },
+     "execution_count": 22,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "b2_encipher('inhisjournaldatedtheidesofoctober', 'arcanaimperii')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 25,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "b2_decipher = b2_encipher"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 26,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'inhisjournaldatedtheidesofoctober'"
+      ]
+     },
+     "execution_count": 26,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "b2_decipher('sevsvrusyrrxfayyxuteemazudmpjmmwr', 'arcanaimperii')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {