local _keys = {

    --[[

    These keys are from the pm3 c-codebase. 

    --]]
    'fffffffffff0', -- Default key (first key used by program if no user defined key)
    '000000000000', -- Blank key
    'a0a1a2a3a4a5', -- NFCForum MAD key
    'b0b1b2b3b4b5',
    'aabbccddeeff',
    '4d3a99c351dd',
    '1a982c7e459a',
    'd3f7d3f7d3f7',
    '714c5c886e97',
    '587ee5f9350f',
    'a0478cc39091',
    '533cb6c723f6',
    '8fd0a4f256e9',

    
    --[[
    The data below is taken form the Slurp project, 
    https://github.com/4ZM/slurp/blob/master/res/xml/mifare_default_keys.xml
    released as GPLV3. 

    --]]

    '000000000000', -- Default key
    'fffffffffff0', -- Default key
    'b0b1b2b3b4b5', -- Key from mfoc
    '4d3a99c351dd', -- Key from mfoc
    '1a982c7e459a', -- Key from mfoc
    'aabbccddeeff', -- Key from mfoc
    '714c5c886e97', -- Key from mfoc
    '587ee5f9350f', -- Key from mfoc
    'a0478cc39091', -- Key from mfoc
    '533cb6c723f6', -- Key from mfoc
    '8fd0a4f256e9', -- Key from mfoc
    -- Data from: http://pastebin.com/wcTHXLZZ
    'a64598a77478', -- RKF SL Key A
    '26940b21ff5d', -- RKF SL Key A
    'fc00018778f7', -- RKF SL Key A
    '00000ffe2488', -- RKF SL Key B
    '5c598c9c58b5', -- RKF SL Key B
    'e4d2770a89be', -- RKF SL Key B
    -- Data from: http://pastebin.com/svGjN30Q
    '434f4d4d4f41', -- RKF JOJO GROUP Key A
    '434f4d4d4f42', -- RKF JOJO GROUP Key B
    '47524f555041', -- RKF JOJO GROUP Key A
    '47524f555042', -- RKF JOJO GROUP Key B
    '505249564141', -- RKF JOJO PRIVA Key A
    '505249564142', -- RKF JOJO PRIVA Key B
    -- Data from: http://pastebin.com/d7sSetef
    'fc00018778f7', -- RKF Rejskort Danmark Key A
    '00000ffe2488', -- RKF Rejskort Danmark Key B
    '0297927c0f77', -- RKF Rejskort Danmark Key A
    'ee0042f88840', -- RKF Rejskort Danmark Key B
    '722bfcc5375f', -- RKF Rejskort Danmark Key A
    'f1d83f964314', -- RKF Rejskort Danmark Key B
    -- Data from: http://pastebin.com/pvJX0xVS
    '54726176656C', -- Transport Key A
    '776974687573', -- Transport Key B
    '4AF9D7ADEBE4', -- Directory and event log Key A
    '2BA9621E0A36', -- Directory and event log Key B
    -- Data from: http://pastebin.com/Dnnc5dFC
    -- New cards are not encrypted (MF Ultralight)
    'fc00018778f7', -- Västtrafiken Key A
    '00000ffe2488', -- Västtrafiken Key B
    '0297927c0f77', -- Västtrafiken Key A
    'ee0042f88840', -- Västtrafiken Key B
    '54726176656c', -- Västtrafiken Key A
    '776974687573', -- Västtrafiken Key B
    -- Data from: http://pastebin.com/y3PDBWR1
    '000000000001',
    'a0a1a2a3a4a5',
    '123456789abc',
    'b127c6f41436',
    '12f2ee3478c1',
    '34d1df9934c5',
    '55f5a5dd38c9',
    'f1a97341a9fc',
    '33f974b42769',
    '14d446e33363',
    'c934fe34d934',
    '1999a3554a55',
    '27dd91f1fcf1',
    'a94133013401',
    '99c636334433',
    '43ab19ef5c31',
    'a053a292a4af',
    '434f4d4d4f41',
    '434f4d4d4f42',
    '505249565441',
    '505249565442',
    -- Data from,:, http://pastebin.com/TUXj17K3
    'fc0001877bf7', -- RKF ÖstgötaTrafiken Key A
    '00000ffe2488', -- RKF ÖstgötaTrafiken Key B
    '0297927c0f77', -- RKF ÖstgötaTrafiken Key A
    'ee0042f88840', -- RKF ÖstgötaTrafiken Key B
    '54726176656c', -- RKF ÖstgötaTrafiken Key A
    '776974687573', -- RKF ÖstgötaTrafiken Key B

    --[[
    The keys below are taken from from https://code.google.com/p/mifare-key-cracker/downloads/list
    --]]

    'bd493a3962b6',
    '010203040506',
    '111111111111',
    '222222222222',
    '333333333333',
    '444444444444',
    '555555555555',
    '666666666666',
    '777777777777',
    '888888888888',
    '999999999999',
    'aaaaaaaaaaaa',
    'bbbbbbbbbbbb',
    'cccccccccccc',
    'dddddddddddd',
    'eeeeeeeeeeee',
    '0123456789ab',
    '123456789abc',
    'ffffffffffff', -- Default key
}

--[[
    The keys above have just been pasted in, for completeness sake. They contain duplicates. 
    We need to weed the duplicates out before we expose the list to someone who actually wants to use them
    
--]]

local function uniq(list)
    
    local foobar = {}
    --print("list length ", #list)
    for _, value in pairs(list) do
        value = value:lower()
        if not foobar[value] then
            foobar[value] = true
            table.insert(foobar, value);
        end
    end
    --print("final list length length ", #foobar)
    return foobar
end

return uniq(_keys)