Substitution Cipher (encoder / decoder) Examples

1. Substitution Cipher encoder

Text : ABCD efghi
Plaintext Alphabet : abcdefghijklmnopqrstuvwxyz
Ciphertext Alphabet : zyxwvutsrqponmlkjihgfedcba

Solution:

The Substitution cipher is a cipher, where each letter of plaintext is replaced by corresponding letter of ciphertext

Plaintext Alphabet

Ciphertext Alphabet

Plaintext	: ABCD efghi
Ciphertext	: ZYXW vutsr

2. Substitution Cipher encoder

Text : hello world
Plaintext Alphabet : abcdefghijklmnopqrstuvwxyz
Ciphertext Alphabet : zyxwvutsrqponmlkjihgfedcba

Solution:

The Substitution cipher is a cipher, where each letter of plaintext is replaced by corresponding letter of ciphertext

Plaintext Alphabet

Ciphertext Alphabet

Plaintext	: hello world
Ciphertext	: svool dliow

This material is intended as a summary. Use your textbook for detail explanation.
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1. Examples