Classical_Cryptography.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Julia Version 0.6.3\n",
      "Commit d55cadc (2018-05-28 20:20 UTC)\n",
      "Platform Info:\n",
      "  OS: Linux (x86_64-pc-linux-gnu)\n",
      "  CPU: Intel(R) Core(TM) i5-4460T CPU @ 1.90GHz\n",
      "  WORD_SIZE: 64\n",
      "  BLAS: libopenblas (DYNAMIC_ARCH NO_AFFINITY Haswell)\n",
      "  LAPACK: libopenblas\n",
      "  LIBM: libm\n",
      "  LLVM: libLLVM-3.9.1 (ORCJIT, haswell)\n"
     ]
    }
   ],
   "source": [
    "versioninfo()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Caesar cipher"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "print_table"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "function encdic(n)\n",
    "    m = string.(collect('a':'z'))\n",
    "    c = [m[mod1(n+i, 26)] for i in 1:26]\n",
    "    c = uppercase.(c)\n",
    "    return Dict(zip(m,c))\n",
    "end\n",
    "\n",
    "\n",
    "\"Encryption\"\n",
    "function enc(s, n)\n",
    "    d = encdic(n)\n",
    "    function encode(c)\n",
    "        return d[c]\n",
    "    end\n",
    "    \n",
    "    return encode.(split(s, \"\")) |> prod\n",
    "end\n",
    "\n",
    "function decdic(n)\n",
    "    m = string.(collect('a':'z'))\n",
    "    c = [m[mod1(n+i, 26)] for i in 1:26]\n",
    "    c = uppercase.(c)\n",
    "    return Dict(zip(c,m))\n",
    "end\n",
    "\n",
    "\"Decryption\"\n",
    "function dec(s, n)\n",
    "    d = decdic(n)\n",
    "    function decode(c)\n",
    "        return d[c]\n",
    "    end\n",
    "    \n",
    "    return decode.(split(s, \"\")) |> prod\n",
    "end\n",
    "\n",
    "\"Convertion table\"\n",
    "function print_table(n)\n",
    "    d = encdic(n)\n",
    "    for item in 'a':'z' \n",
    "        print(item, \" \")\n",
    "    end\n",
    "    println()\n",
    "    for item in string.('a':'z')\n",
    "        print(d[item], \" \")\n",
    "    end\n",
    "end"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "a b c d e f g h i j k l m n o p q r s t u v w x y z \n",
      "D E F G H I J K L M N O P Q R S T U V W X Y Z A B C "
     ]
    }
   ],
   "source": [
    "# shift 3 charactor\n",
    "print_table(3)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "\"MKD\""
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "enc(\"cat\", 10) |> prod"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "\"cat\""
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dec(\"MKD\", 10)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Simple substitution cipher"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "a: Z\n",
      "b: V\n",
      "c: F\n",
      "d: H\n",
      "e: U\n",
      "f: T\n",
      "g: J\n",
      "h: K\n",
      "i: C\n",
      "j: R\n",
      "k: Q\n",
      "l: P\n",
      "m: I\n",
      "n: G\n",
      "o: S\n",
      "p: E\n",
      "q: X\n",
      "r: M\n",
      "s: O\n",
      "t: Y\n",
      "u: L\n",
      "v: D\n",
      "w: N\n",
      "x: A\n",
      "y: B\n",
      "z: W\n"
     ]
    }
   ],
   "source": [
    "srand(2018)\n",
    "m = string.('a':'z')\n",
    "c = uppercase.(shuffle(m))\n",
    "simple_encdic = Dict(zip(m,c))\n",
    "simple_decdic = Dict(zip(c,m))\n",
    "\n",
    "for c in string.('a':'z')\n",
    "    println(c, \": \", simple_encdic[c])\n",
    "end"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "simple_dec (generic function with 1 method)"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "simple_enc(s) = map(x -> simple_encdic[x], string.(split(s, \"\"))) |> prod\n",
    "simple_dec(s) = map(x -> simple_decdic[x], string.(split(s, \"\"))) |> prod"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "\"FZY\""
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s = \"cat\"\n",
    "simple_enc(s)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "\"cat\""
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "simple_dec(simple_enc(s))"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Julia 0.6.2",
   "language": "julia",
   "name": "julia-0.6"
  },
  "language_info": {
   "file_extension": ".jl",
   "mimetype": "application/julia",
   "name": "julia",
   "version": "0.6.3"
  },
  "latex_envs": {
   "LaTeX_envs_menu_present": true,
   "autoclose": false,
   "autocomplete": true,
   "bibliofile": "biblio.bib",
   "cite_by": "apalike",
   "current_citInitial": 1,
   "eqLabelWithNumbers": true,
   "eqNumInitial": 1,
   "hotkeys": {
    "equation": "Ctrl-E",
    "itemize": "Ctrl-I"
   },
   "labels_anchors": false,
   "latex_user_defs": false,
   "report_style_numbering": false,
   "user_envs_cfg": false
  },
  "toc": {
   "nav_menu": {},
   "number_sections": true,
   "sideBar": true,
   "skip_h1_title": false,
   "toc_cell": false,
   "toc_position": {},
   "toc_section_display": "block",
   "toc_window_display": false
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}