About ClassGuard

The most important property of software developers is their knowledge. The source code of Java programs can easily be recovered from a delivered jar file. This is fundamentally different from languages like C.

ClassGuard is a tool to prevent Java decompiling. Your Java class files are encrypted using a 128Bit AES encryption. The AES key is generated randomly every time you start the encryption tool. The decryption is done transparently by a custom class loader. The main part of this class loader is written in C to prevent decompiling and other tampering.

The current version additionally contains a license manager for Java applications. The main part of the license manager is also written in C. Java class files are only decrypted if a valid license is found.

About KeyGuard

KeyGuard is a cryptographically secure, multi-user, multi-platform password safe. You can use KeyGuard for any kinds of passwords, like social network passwords, computer passwords, or store accounts. KeyGuard is available as open source version (licensed under GPL) and as a commercial version.

About jsecurity.net

jsecurity.net offers security solutions for the Java Platform. Our team has more than 10 years of knowledge in Java programming, encryption technologies and the Java/C interface (JNI). We also offer trainings on these topics.