Encryption is a method used to secure information by converting it into a code to prevent unauthorized access. This process ensures that only those with the correct decryption key can read the original data, making it essential for protecting sensitive information such as personal data, financial transactions, and confidential communications. There are various types of encryption, including symmetric and asymmetric encryption, each serving different purposes. Symmetric encryption uses the same key for both encryption and decryption, while asymmetric encryption employs a pair of keys. Overall, encryption plays a crucial role in maintaining privacy and security in the digital age.