The purpose of data encryption in mobile applications is to protect sensitive user information from unauthorized access and potential breaches. Encryption transforms data into an unreadable format that can only be decrypted by authorized users or systems, safeguarding personal data, transactions, and communication. Employing strong encryption standards ensures that data remains secure, even if intercepted by malicious actors. In an era of increasing data privacy concerns, encryption is essential for maintaining user trust and compliance with regulations such as GDPR and HIPAA, ultimately enhancing the security of mobile applications.