My Encrypter 2

local MinASCII = 65
local MaxASCII = 90

local EncMsg = [==============================[
print("Hello, world!")
]==============================]

local random = math.random
local toByte = string.byte
local toChar = string.char

local function encryptString(Msg)
    local NewKeyNums = {}
    local NewEncryptionChars = {}

    local NewEncryption = ""

    local MaxAsc = MinASCII+25
    for i = 1, #Msg do
        NewKeyNums[#NewKeyNums+1] = random(MinASCII, MaxAsc)
    end

    for i = 1, #Msg do
        local OrigByte = toByte(Msg:sub(i, i))
        local EncryptedChar = toChar(offsetASCII(OrigByte, NewKeyNums[i]))
        local TotalOffset = (toByte(EncryptedChar) - OrigByte) * -1
        NewKeyNums[i] = TotalOffset
        NewEncryptionChars[#NewEncryptionChars+1] = EncryptedChar
    end

    local NewKey = table.concat(NewKeyNums, "%20")
    local NewEncryption = table.concat(NewEncryptionChars)
    return NewKey, NewEncryption
end

math.randomseed(tick())

local NewKey, NewEncryption = encryptString(EncMsg)

print("Key: " .. NewKey) --The key
print("Encryption: " .. NewEncryption) --The encryption