Solved

Java .class Files and Security

Posted on 2009-05-07
4
176 Views
Last Modified: 2013-12-29
Hello,

I was curious how secure Java .class files are created using current versions of Java.

1. Can a Java .class file be uncompiled to be able to see the source code?

2. Is there a way to prevent this and\or encrypt it?


Thanks,

Michael
0
Comment
Question by:michael4606
  • 2
4 Comments
 
LVL 86

Assisted Solution

by:CEHJ
CEHJ earned 150 total points
ID: 24326420
>>1. Can a Java .class file be uncompiled to be able to see the source code?

Yes, using a decompiler

>> 2. Not ultimately. All you can do is make it more difficult by using an obfuscator.


If you keep classes server-side, they should be safe though.
0
 
LVL 12

Expert Comment

by:basav_com
ID: 24326434
You can use java decompilers to see the source code of the .class files.
http://www.javaworld.com/javaworld/jw-07-1997/jw-07-decompilers.html
0
 
LVL 12

Accepted Solution

by:
basav_com earned 250 total points
ID: 24326453
You can use 'Code Obfuscation' to prevent reverse engineering :)
http://www.cs.arizona.edu/~collberg/Research/Students/DouglasLow/obfuscation.html
0
 
LVL 92

Assisted Solution

by:objects
objects earned 100 total points
ID: 24332221
1. usually, though the quality of the source depends on what ofuscation was applied

Have a look here http://www.zelix.com/klassmaster/index.html


This is a good read on the subject

http://www.excelsior-usa.com/articles/java-obfuscators.html
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
bitbucket vs gitbucket 3 57
egit plugin on eclipse 8 33
servlet filter example 37 41
use lov values 2 29
For customizing the look of your lightweight component and making it look opaque like it was made of plastic.  This tip assumes your component to be of rectangular shape and completely opaque.   (CODE)
In this post we will learn how to connect and configure Android Device (Smartphone etc.) with Android Studio. After that we will run a simple Hello World Program.
The viewer will learn how to implement Singleton Design Pattern in Java.
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …

912 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now