JCEKS stands for Java Cryptography Extension KeyStore. It is a proprietary keystore format used by the Java platform for storing cryptographic keys and certificates. Unlike the more standard JKS (Java KeyStore) format, JCEKS supports stronger encryption algorithms. This makes it suitable for storing sensitive cryptographic material where enhanced security is required. The keystore itself is a file that contains private keys and their corresponding X.509 certificate chains authenticating the corresponding public keys. It's used to establish secure communication channels, digitally sign data, and encrypt data. JCEKS is often used in Java-based applications and servers that require secure storage of cryptographic keys, such as web servers, application servers, and other security-sensitive applications. While offering stronger encryption, JCEKS is less portable than JKS as it's specific to the Java platform and may not be supported by other cryptographic libraries or systems. It's crucial to protect the JCEKS file itself with a strong password, as unauthorized access to the keystore would compromise the security of the stored keys.