If you deploy .NET assemblies to your client machines, some kind of decompilation will always be possible using reflector and similar tools. However, this situation isn’t materially different to what you’d encounter if you wrote the application in native C++. It is always possible to decompile things – if it were impossible, the processor couldn’t … Read more
I released a free anti-malware app for Android, and making sure nobody hacked it was essential to its success. The biggest threats agains an app on the Android Market include leaked source code, copied/distributed paid apps, and re-keying. I explain each below and way to solve them. Firstly, this paper describes how to reverse-engineer an … Read more
We do exactly that in our of our apps and it works great.It’s a free app that you can upgrade to a full version and we store the upgrade indicator in the keychain. The upgrade indicator is an arbitrary string that you choose, but for the purposes of the keychain it is treated as a … Read more
Don’t try and obfuscate or encrypt the code – it will never work. I would suggest selling the Django application “as a service” – either host it for them, or sell them the code and support. Write up a contract that forbids them from redistributing it. That said, if you were determined to obfuscate the … Read more
In a nutshell, the main difference between Dotfuscator Community Edition and the other “professional” editions is that Community Edition will only really obfuscate and change your namespaces, method names, and other “public” accessible aspects of your classes. It won’t delve into the functions themselves and obfuscate the “private” code within the function. Also, the Community … Read more
UPDATE Please visit and read Thanks to chpwn in the comments. Code that’s way too old! – 11th May 2009 For now there’s an easier way to detect if your iPhone application has been cracked for piracy use. This does not involve you to check the iPhone unique IDs against a list of accepted IDs. … Read more
Note: Since the complete version of this answer exceeds Stack Overflow’s length limit, you’ll need to head to GitHub to read the extended version, with more tips and details. In order to hinder scraping (also known as Webscraping, Screenscraping, Web data mining, Web harvesting, or Web data extraction), it helps to know how these scrapers … Read more