Protect Java code from decompilation

Java, Tomcat, SpringBoot Applications hardening and protection, a solution beyond obfuscation

How Protector4J Works

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

Private Archive Format: JARX

Customized Hardened JRE

Disable Any Remote Mechanism in JVM

Binary Code Level Protection

Issues with current java code protection solutions

Code Obfuscation

Due to the high semantic nature of JVM bytecode, it is very easy to analyze and read. By using dynamic debugging, its running logic can be easily analyzed. Writing dynamic debugging tools is not a very complex task, so obfuscation is not a reliable protection solution.

Class File Encryption

Due to the existence of JVM attachment mechanism, all so-called encrypted codes that have not been detached from regular JVM execution can be easily read with attachment tools. Therefore, this is the most ineffective protection solution.

VMP Protection

VMP is the strongest type of code protection. However, due to its severe impact on performance, it cannot be applied to all codes in a program, and can only protect key codes. Other codes are still at risk of exposure. By using other parts of the code as an entry point, the functional information of the virtualized part of the code can be obtained.

AOT Compilation

AOT compilation is difficult to configure and compile, and it has a high probability of failing. Even if the compilation is successful, the code logic only changes from bytecode representation to machine code representation. Its inherent operational logic still exists without any special protection. If one can understand its compilation and execution mechanism, it is still possible to restore the 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 use Protector4J to protect your application.

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JavaSEProtect JavaSE Applications

TomcatProtect Tomcat Web Applications

Spring BootProtect Spring Boot Applications