Data encryption is a process that transforms information into a secure format, making it unreadable to unauthorized users. This technique is essential for protecting sensitive data, such as personal information and financial records, from cyber threats and breaches. By using algorithms and keys, data encryption ensures that only those with the correct decryption key can access the original information. This practice is widely used in various applications, including secure communications, online banking, and data storage, helping to maintain privacy and integrity in the digital world.