A Systematic Review of Java Security: Architecture, Cryptographic Services, Vulnerabilities, and Emerging Security Paradigms
ava continues to play a significant role in the development of enterprise software, mobile applications, and embedded solutions because of its portability, reliability, and extensive security capabilities. This review investigates the security ecosystem of the Java platform by examining both its built-in protection mechanisms and the security challenges faced by modern Java applications. The study begins with an analysis of the fundamental components of Java’s security model, including the Java Virtual Machine (JVM), bytecode validation processes, class-loading mechanisms, and the Security Manager, whose role has diminished in recent Java releases. In addition, the review discusses the Java Cryptography Architecture (JCA), emphasizing its support for widely used security technologies such as the Advanced Encryption Standard (AES), Rivest–Shamir–Adleman (RSA) encryption, SHA-256 hashing, secure random number generation, and Transport Layer Security (TLS) protocols for protected communication. The paper further investigates common vulnerabilities observed in Java-based systems. Particular attention is given to issues such as SQL injection, unsafe deserialization practices, misuse of reflection, exposure of hard-coded credentials, and reliance on outdated cryptographic algorithms. The causes of these weaknesses, their potential consequences, and recommended countermeasures are examined with reference to established security standards and current academic research. In addition, the review outlines key secure software development practices that can strengthen application security. These include parameterized database queries, rigorous input validation and sanitization techniques, adherence to the principle of least privilege, and systematic management of third-party libraries and dependencies throughout the software lifecycle. The paper also discusses recent developments shaping the future of Java security. Topics include the gradual retirement of the Security Manager, the increasing importance of the Java Platform Module System (JPMS) for application modularization and isolation, security considerations in cloud-native deployments, and the growing application of artificial intelligence for automated vulnerability identification and threat analysis. By consolidating findings from contemporary literature, these reviews offers insights into Java’s evolving security landscape and presents practical guidance for building resilient and secure Java applications.