EXAMPLE  OF  USING  SIMPLIFIED  DES*

 
 

Input:
 
1
0
1
0
0
1
0
1

Key:
 
0
0
1
0
0
1
0
1
1
1



Generating KEY1

Original key :
 
0
0
1
0
0
1
0
1
1
1

After applying (A):
 
1
0
0
0
0
1
0
1
1
1

After applying (B):
 
0
0
0
0
1
0
1
1
1
1

After applying (C):
 


KEY1

0
0
1
0
1
1
1
1


Generating KEY2

Original key :
 
0
0
1
0
0
1
0
1
1
1

After applying (A):
 
1
0
0
0
0
1
0
1
1
1

After applying (B):
 
0
0
0
0
1
0
1
1
1
1

After applying (D):
 
0
0
1
0
0
1
1
1
0
1

After applying (C):

KEY2

1
1
1
0
1
0
1
0



ENCRYPTION

Original input:
 
1
0
1
0
0
1
0
1


(1)  Apply IP:
 
0
1
1
1
0
1
0
0


(2)  Apply  FKey1:
 


(3)  Apply SW:
 
0
1
0
0
1
0
0
1


(4)  Apply  FKey2:
 


(5)  Apply IP-1:
 
0
0
1
1
0
1
1
0
*Example by Laura Sanchis, Colgate University.