Matthew's Decoders

Matthew Parker’s Decoder #2010-7

Learn how to crack a veggie code.

Matthew Parker's Decoder #2010-6

Learn how to decode a mirror message.

Matthew Parker's Decoder #2010-5

Learn how to crack a telephone keypad code.

Matthew Parker's Decoder #2010-4

Learn how to use maritime signal flags.

Matthew Parker's Decoder #2010-3

Learn about upper case and lower case letters.

Matthew Parker's Decoder #2010-2

Learn Morse code.

Matthew Parker's Decoder #2010-1

Learn the Polybius checkerboard.