Coded messages

One method of coding is to use Morse code which encodes alphabetic and numeric characters with a sequence of dots (".") and dashes ("-"). An outline of the code is:

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("——··").

For an example, click on the following:

Find the following messages:

Coding	Answer	Result
·— —·· ··— ·—·· —		Incorrect
·——· · ·—· ··· ——— —·		Incorrect
——· ·—·· ··— ——		Incorrect
—··· ——— —· ·		Incorrect
	Score	0

The ADFGVX Cipher

The ADFGVX cipher has been used in many applications. It is made from a grid:

	A	D	F	G	V	X
A	8	p	3	d	1	n
D	l	t	4	o	a	h
F	7	k	b	c	5	z
G	j	u	6	w	g	m
V	x	s	v	i	r	2
X	9	e	y	0	f	q

where "cat" becomes: FG DV DD

Use the ADFGVX ciper to decode the following:

Coding	Answer	Result
VD GX VG DA XD		Incorrect
DA VG GV DX DD		Incorrect
GX XD DD DX DG AG		Incorrect
	Score	0

and in Text speak:

Coding	Answer	Result
2BORNT2B		Incorrect
LOM8THISISGR8. CUL8R		Incorrect
	Score	0

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Developed by Bill Buchanan, Jamie Graves, Zibi Kwecka and Lionel Saliou, Centre for Distributed Computing and Security [link].