What is Cryptography?

Cryptography is the practice of securing communication from unauthorized access or disclosure. It involves the use of mathematical algorithms and protocols to convert plaintext into ciphertext and back again. The goal of cryptography is to ensure that only the intended recipient can access and read the encrypted data, while preventing unauthorized parties from intercepting and decrypting the data. Cryptography has been used for centuries to protect sensitive information, such as military secrets and diplomatic correspondence. In the modern era, cryptography is an essential component of secure communication on the internet, where it is used to protect financial transactions, sensitive data transmissions, and personal information. Cryptography involves two main processes: encryption and decryption. Encryption is the process of converting plaintext into ciphertext, which is unreadable without the appropriate decryption key. Decryption is the process of converting ciphertext back into pl