A cipher is a method of encrypting information so that it can only be read by people who have the key to decrypt it. There are many different types of ciphers, but they all work on the same basic principle: they use a mathematical algorithm to scramble the data in a way that makes it difficult to unscramble without the key.
Ciphers have been used for centuries to protect sensitive information, from military secrets to personal correspondence. In the modern world, ciphers are used to protect everything from online banking transactions to medical records. Ciphers are an essential tool for keeping our information safe and secure.
