Make your own free website on Tripod.com

Make a code

Our group then used what we learnt from decoding the various stages to create our own code. The two most important members of our groups involved in the making of this code are Bi Ran and Tony Liew.

 

First, number the letters from A to Z as 01, 02, 03......26.

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

0102030405060708091011121314151617181920212223242526

 

Pick out the numbers of the letters of the sentence to encode and write the message using the numbers.

T H I S I S A S I M P L E C I P H E R

20080919091901190913161205030916080518

 

Then write them under a codeword , e.g CODING . Use 0 to fill up the blanks.

 

CODING

200809

190919

011909

131612

050309

160805

180000

 

Then write the rows from up to down, in alphabetical order , that is CDGINO according to the letter on top of the row.

 

210101100110009992950899638001010000913568

 

Then split them into twos.

 

21 01 01 10 01 10 00 99 92 95 08 99 63 80 01 01 00 00 91 35 68

 

 

And transfer the numbers into the cipher alphabet using this key:

 

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 a b c d e f g h i 0102030405060708091011121314151617181920212223242526272829303132333435

j k l m n o p q r s t u v w x y z a ? d e ? ? ? ? ? ? ? ? ? p ? ?

3637383940414243444546474849505152535455565758596061626364656667686970

s t ? f ? ? ? G ? T ? ? ? S F ? O ! @ # $ % ^ & * ( ) _ + ?

717273747576777879808182838485868788899091929394959697989900

 

Encoded message: UAAJAJ?+%*H+ ?? aa??$i p

 

To decode the message, reverse the process.