Lab 5 CSES

Lab 5.1 – Transposition Cipher

ENJOY

1. Alphabetical Order of the Keyword

E	N	J	O	Y
1	3	2	4	5

2. Plaintext Table:

Arrange the plaintext in rows of 5 characters each and pad the last row with *:

1	2	3	4	5
w	e	*	a	r
e	*	g	o	i
n	g	*	t	o
*	c	i	n	e
m	a	*	a	f
t	e	r	*	t
h	e	*	m	e
e	t	i	n	g
*	t	o	n	i
g	h	t	*	*

3. Cipher Text (encrypted)

1	3	2	4	5
w	*	e	a	r
e	g	*	o	i
n	*	g	t	o
*	i	c	n	e
m	*	a	a	f
t	r	e	*	t
h	*	e	m	e
e	i	t	n	g
*	o	t	n	i
g	t	h	*	*

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German

CIPHER TEXT : n*wfc*etslhtd*altsee*o*edea*a*fht*el 1.

G	E	R	M	A	N
3	2	6	4	1	5

2. Cipher Text

1	2	3	4	5	6
n	e	d	e	d	f
*	t	*	e	e	h
w	s	a	*	a	t
f	l	l	o	*	*
c	h	t	*	a	e
*	t	s	e	*	l
Plain Text

3	2	6	4	1	5
d	e	f	e	n	d
*	t	h	e	*	e
a	s	t	*	w	a
l	l	*	o	f	*
t	h	e	*	c	a
s	t	l	e	*	*

plain text : defend*the*east*wall*of*the*castle**

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Exercise 5.2

1. Install steghide

2. Embed secret text with image

3. Extracted the secret steghide and steghide image info

4. Stegosuite embed