Protect Java code from decompilation

Java, Tomcat, SpringBoot application reinforcement and protection, a solution beyond obfuscation.

How Protector4J Works

We are committed to providing the best Java code protection solutions, fully considering the characteristics of the JVM and the Java language, and launching the most suitable Java code protection solutions for the current situation.

Private compressed document format: JARX

Customized JRE only supports loading JARX files

Disable the JVM's remote attachment mechanism

Binary Level Protection

Issues with the current code protection scheme

Code obfuscation

Due to the high semantic nature of JVM bytecode, it makes it very easy to analyze and read. It is easy to analyze its running logic using dynamic debugging, and the writing of dynamic debugging tools is not a very complex task. Therefore, obfuscation is not a reliable protection solution.

Class file encryption

Due to the presence of JVM attachment mechanism, all so-called encrypted code that is not running outside of the regular JVM can easily be read using attachment tools. Therefore, this is the most ineffective protection solution.

VMP Protection

Virtualization protection is the strongest code protection method. However, due to its significant impact on performance, it cannot be applied to all the code in the program. It can only protect the critical code, while the remaining code still faces the risk of exposure. By infiltrating through other parts of the code, functional information of the virtualized code can be obtained.

AOT Compilation

The difficulty of configuring AOT compilation is high, the difficulty of compilation is high, and the probability of compilation failure is high. Even if the compilation is successful, the code logic is only converted from bytecode representation to machine code representation, and its own operational logic still exists without any special protection. If one can understand its compilation and execution mechanisms, it is still possible to reverse engineer readable code.

Get Started

We currently support three types of Java applications: JavaSE, Tomcat, and Spring Boot. Click the button on the right to learn how to protect your application with Protector4J.

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JavaSEProtect JavaSE applications

TomcatProtecting Tomcat Applications

Spring BootProtecting Spring Boot Applications