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Dec 11th, 2019
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  1.  
  2. input = "According to all known laws of aviation; there is no way a bee should be able to fly. Its wings are too small to get its fat little body off the ground. The bee: of course, flies anyway because bees don't care what humans think is impossible."
  3.  
  4. math.randomseed(os.time())
  5. key = {
  6. a = "%",
  7. b = "2",
  8. c = "+",
  9. d = "]",
  10. e = "@",
  11. f = "9",
  12. g = "~",
  13. h = "^",
  14. i = "`",
  15. j = ";",
  16. k = "*",
  17. l = "#",
  18. m = ")",
  19. n = "[",
  20. o = ":",
  21. p = "&",
  22. q = "i",
  23. r = "(",
  24. s = "/",
  25. t = "}",
  26. u = "7",
  27. v = "{",
  28. w = "1",
  29. x = "=",
  30. y = "_",
  31. z = "4",
  32.  
  33. noise = "-",
  34. upper = "p",
  35. }
  36.  
  37. key[" "] = "8"
  38. key["."] = "5"
  39. key[","] = "3"
  40. key[":"] = "o"
  41. key[";"] = "w"
  42. key["'"] = "\""
  43. key["!"] = "0"
  44. key["?"] = "!"
  45.  
  46. function code(str)
  47. local r = ""
  48. for i = 1, #str do
  49. replaced = false
  50. char = string.sub(str, i, i)
  51.  
  52. if math.random(1,5) == 1 then
  53. r = (r .. key.noise)
  54. end
  55. for _, v in pairs(key) do
  56. if string.lower(char) ~= char and string.lower(char) == _ then
  57. r = (r .. key.upper .. v)
  58. replaced = true
  59. elseif
  60. string.lower(char) == _ then
  61. r = (r .. v)
  62. replaced = true
  63. end
  64. if char == key.noise then
  65. replaced = true
  66. end
  67. end
  68. if (not replaced) then
  69. print("Invalid character: " .. char)
  70. end
  71. end
  72.  
  73. return r
  74. end
  75.  
  76. function decode(str)
  77. local r = ""
  78. for i = 1, string.len(str) do
  79. char = string.sub(str, i, i)
  80.  
  81. if char ~= key.noise then
  82. for _, v in pairs(key) do
  83. if char == v then
  84. if v == key.upper then
  85. upper = true
  86. else
  87. if upper then
  88. r = r .. string.upper(_)
  89. else
  90. r = r .. _
  91. end
  92. upper = false
  93. end
  94. end
  95. end
  96. end
  97. end
  98.  
  99. return r
  100. end
  101.  
  102. a = code(input)
  103. print("Coded: " .. a)
  104. io.write("\n")
  105. a = decode(a)
  106. print("Decoded: " .. a)
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