# Codes

The *Vigenère Cipher* is a classical cryptographic method that enhances the security of simple substitution ciphers. It was developed by the French diplomat **Blaise de Vigenère** in the **16**th century.

The *Vernam Cipher*, also known as the "*One-Time Pad*," is a powerful and unbreakable encryption technique known for its exceptional security when used correctly. It falls under the category of symmetric encryption, where both the sender and recipient share the same secret key.

The *Trifid Cipher* is a cryptographic technique that combines elements of substitution and transposition ciphers to encrypt messages. It was invented in **1901** by **Félix Delastelle**, a French cryptographer, and is known for its use of three-dimensional representations.

A *Transposition Cipher* is a type of cryptographic method that encrypts messages by rearranging the characters or symbols of the plaintext without altering the original letters themselves. Instead of replacing letters with different symbols (as in substitution ciphers), *transposition cipher*s focus on changing the order of the characters to conceal the message.

The *Templar Cipher* is a cryptographic method associated with the **Knights Templar**, a medieval Christian military order founded during the Crusades. It is one of the many historical ciphers that have been attributed to the **Knights Templar**, although the exact cipher they used remains a subject of debate and speculation.

## - WW II (POWs)

Tap Codes are a clever and secretive way of communicating using a series of taps or knocks. This form of communication was devised to facilitate discreet messaging, especially in situations where speaking aloud is not an option or could be overheard.

## AKA: Phone Code

In the T9 system, each digit key on the phone keypad corresponds to a set of letters. By pressing the keys multiple times, you cycle through the letters associated with each key. The mapping of letters to the keypad digits is based on the arrangement of letters on a standard telephone keypad:

The *Spiral Cipher* is a method of encrypting messages by arranging the plaintext in a spiral pattern, typically on a grid or matrix. It is a type of transposition cipher, where the original letters of the message are preserved but rearranged in a specific order.