Java Cryptography is a framework provided by the Java programming language that allows developers to implement secure communication and data protection in their applications. It includes various algorithms for encryption, decryption, hashing, and digital signatures, ensuring that sensitive information remains confidential and tamper-proof. The Java Cryptography Architecture (JCA) and Java Cryptography Extension (JCE) are key components of this framework. JCA provides a set of APIs for cryptographic operations, while JCE adds support for encryption and decryption using various algorithms. Together, they enable developers to create secure applications that protect user data effectively.