Cryptographic security in Android apps is a crucial aspect of protecting sensitive data and ensuring privacy. It involves using encryption algorithms, secure key management, and secure communication protocols to safeguard information both at rest and in transit. Android provides various cryptographic tools, such as the Keystore system, to securely store cryptographic keys and prevent unauthorized access. Developers use these tools to implement features like data encryption, secure authentication, and integrity verification. By leveraging cryptographic security, Android apps can protect user data from threats such as data breaches, man-in-the-middle attacks, and unauthorized access, ensuring that user information remains private and secure.