“From Scytale to AES: A Brief History of Cryptography”

Cryptography secures information from unauthorized access by transforming it into a format that individuals with access to the decryption key can only read. Cryptography has been used for thousands of years, with the earliest known instances of cryptography dating back to ancient civilizations like the Egyptians and Greeks. In this blog, we will dive deep into the world of cryptography, exploring its history, various techniques, and modern applications.

History of Cryptography:

Cryptography has been used throughout history to protect sensitive information from unauthorized access. One of the earliest known examples of cryptography is the scytale, a tool used by the Spartans to send secret messages during military campaigns. The scytale was a wooden rod with a strip of parchment wrapped around it. The letter was written on the parchment, and once it was unwrapped, it was scrambled, making it unreadable without the correct tools.

Another notable example of ancient cryptography is the Caesar Cipher, which Julius Caesar used to encode hismessages. The Caesar Cipher is a simple substitution cipher that shifts each alphabet letter by a certain number of places. For example, if the shift value is 3, A becomes D, B becomes E, and so on.