Data encryption is the process of converting information into a code to prevent unauthorized access. This ensures that only individuals with the correct decryption key can read the original data. Encryption is commonly used to protect sensitive information, such as personal details, financial records, and confidential communications. There are various encryption methods, including symmetric encryption, where the same key is used for both encryption and decryption, and asymmetric encryption, which uses a pair of keys—one public and one private. These techniques are essential for maintaining privacy and security in digital communications and data storage.