How can i encrypt java class files

Hi guys,,

i joined this forum today to get an insight into the various genious people who are giving solutions here..

i have a query
1. How can i encrypt java class files.
2. i used proguard to obfuscate then after processing a .pro file is generated, how do i run this file again to get the result.


looking forward to suggestions..
thanx

I suggest using the built-in crypto package. Write an unencrypted class that the user launches, that requires them to enter the key, which then unencrupts the class files in memory as needed, and uses a cutomized ClassLoader to load them in.

Of course, this is not entirely secure, since the data does then exists in memory in an unencrypted form, and someone clever with a trojan installed could feasibly extract it.