In my own word, a mapping encryption technique, where in which we map letters to different letters.
A monoalphabetic cipher is a simple substitution cipher where each letter of the plaintext is replaced by a corresponding letter from a fixed alphabet. In other words, it is a one-to-one mapping of letters.
Here's an example to illustrate how a monoalphabetic cipher works:
<ol>
<li>Generate a random permutation of the alphabet. For simplicity, let's use the English alphabet:</li>
</ol>
Plain: 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
Cipher: Q W E R T Y U I O P A S D F G H J K L Z X C V B N M
<ol>
<li>Take a message you want to encrypt. Let's use the message "HELLO WORLD" as an example.
</li>
<li>Replace each letter in the message with its corresponding letter from the cipher alphabet:
</li>
</ol>
Plain: H E L L O W O R L D
Cipher: D S Y Y I G D F S L
So, "HELLO WORLD" would be encrypted as "DSYYIGDFSL" using this particular monoalphabetic cipher.
Monoalphabetic ciphers are relatively weak and easily breakable with frequency analysis, where the frequency of letters in the encrypted text is analyzed to deduce the mapping. Therefore, they are not considered secure for modern encryption purposes.

In my own word, a mapping encryption technique, where in which we map letters to different letters.

A monoalphabetic cipher is a simple substitution cipher where each letter of the plaintext is replaced by a corresponding letter from a fixed alphabet. In other words, it is a one-to-one mapping of letters.

**Here's an example to illustrate how a monoalphabetic cipher works:**

1. Generate a random permutation of the alphabet. For simplicity, let's use the English alphabet:
    

Plain: 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

Cipher: Q W E R T Y U I O P A S D F G H J K L Z X C V B N M

1. Take a message you want to encrypt. Let's use the message "HELLO WORLD" as an example.
    
2. Replace each letter in the message with its corresponding letter from the cipher alphabet:
    

Plain: H E L L O W O R L D

Cipher: D S Y Y I G D F S L

So, "HELLO WORLD" would be encrypted as "DSYYIGDFSL" using this particular monoalphabetic cipher.

Monoalphabetic ciphers are relatively weak and easily breakable with frequency analysis, where the frequency of letters in the encrypted text is analyzed to deduce the mapping. Therefore, they are not considered secure for modern encryption purposes.

Monoalphabetic Cipher