File encryption is a process that transforms data into a secure format, making it unreadable to unauthorized users. This is achieved using algorithms and keys, which are essential for both encrypting and decrypting the information. When a file is encrypted, only those with the correct key can access its original content. The primary purpose of file encryption is to protect sensitive information from theft or unauthorized access. It is commonly used for securing personal data, financial records, and confidential business documents. By encrypting files, individuals and organizations can ensure that their information remains private and secure, even if it falls into the wrong hands.