License enforcement the application of an access control policy on code, restricting the environments in which it may be executed.

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1answer
44 views

secure ways to prevent access to an application by more than one person at a time?

If an application is licensed in such a way that is set up for one user, on one computer, how can I secure it? Even if locking into one computer, how could you prevent the computer from being ...
0
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0answers
33 views

Altering assembly without affecting digital signature

I have discovered a software crack where the license check assembly (.NET) has been altered but the digital signature and the strong name are both still perfectly intact. Strong naming is easy to ...
4
votes
1answer
985 views

Encrypting/decrypting our license key

We need to provide a license key to customers for our application. The actual license is XML but we need to encrypt it and then in our program decrypt it. I think it is the following, but am asking to ...
3
votes
5answers
149 views

Is it secure to ship public key with license file?

I've implemented a licensing client and server for our web-applications. Currently there is only one way for licensing an app, user should manually upload the license file using specified form and ...
1
vote
2answers
72 views

Flaws in my proposed license verification system?

in my firm, most of the software is secured by a couple of different antiquated licensing systems. For example, after setup the user has to start another program that tells him his calculated machine ...
14
votes
3answers
16k views

License key / Serial number generator and checker

I need a serial number generator and accompanying checker. I would like to be able to set a salt (and maybe a length). The generator should only produce serial numbers that pass the test of the ...
1
vote
2answers
177 views

Where is my missunderstanding in how digital signatures are used with licence files to allow program to run?

I'm trying to learn how digitally signing a licence file helps prevent piracy. For example say an application only runs if it verifies the date as specified in a licence file has not past. Obviously ...
4
votes
2answers
95 views

How can I generate short signatures?

I'm looking to create a licensing system, and I need a serial generation scheme. I want to sign some data with a private key and verify it with a public key embedded in the software. I don't need ...
32
votes
11answers
11k views

Can 'cracked' product keys harm the user in any way?

If a user download commercial software through the official, corresponding website, but use a product key which you did not legitimately purchase (e.g. websites that offer a list of product keys for ...
0
votes
1answer
123 views

Xbox and Playstation copyright protection vs PC

AFAIK, both Xbox one and PS4 use x86 IC very similar to PC. The questions are: 1/ How can they keep those console systems protected from cracker and software privacy? What is the main method to ...
5
votes
5answers
313 views

Should you notify software vendors that their software has been cracked?

Apologies if this is not the right place to ask this question, I will happily move it to another Stack Exchange site if need be. Before I explain the rationale behind the question, let me clear up a ...
2
votes
2answers
320 views

Obstacle in Implementing a Time Limited/Number of Use Limited Software

How does one implement a trial period in a product properly, e.g. a trial period that lasts 30 days, or limits the number of product uses to 10? Storing the entries, even in an encrypted form, isn't ...
2
votes
1answer
898 views

Examples for practicing reverse engineering/disassembly of win32 .executables

I remember back in the day, there used to be a website where users would post hackits in the form of win32 exes for users to crack. Usually the goal was to defeat some sort of DRM, such as a nag ...
0
votes
1answer
1k views

copy protection (or licensing) mechanism for an android app

I am trying to implement a copy protection (or licensing) mechanism for an android app. The app is not distributed through Google Play or other online market and instead it is distributed through ...
1
vote
2answers
212 views

Restricting source code to domain name

I'm starting a very large project soon. It must include a licensing system. The project will produced using PHP/Laravel/JavaScript and use many different libraries, a CMS, and a few databases. The ...
4
votes
1answer
452 views

Storing License Keys

I'm creating an application which generates licenses key and stores this in a database (the licenses are checked online). I don't wish to store these license unhashed, in case the database is stolen. ...
1
vote
5answers
2k views

Encrypt-function inside PHP code that you have to publish

If you write a PHP application, where you have to deliver the compiled code to the customer, how could you include a functionality to send encrypted data from that application to others, and include ...
-3
votes
1answer
154 views

Am I covered with GPL If I want to share open source code of project developed in my company? [closed]

I do not know if it's the right place to ask this question. But I find that this site is the closest site in the exchange sites to ask a such question. I m working in a company and in my job contract ...
-3
votes
1answer
4k views

How can police find out about criminal activity on an iPod Touch?

Higher authorities could easily find out about criminal activity - such as drug trafficking and child pornography - being conducted on a laptop simply by hacking into it or somehow seeing the history. ...
4
votes
1answer
298 views

The best ways to persist the license client information in the database

I develop a license server and a license client system (Java based applications). The flow is the following: The license is stored on the license server The client application includes a ...
0
votes
3answers
263 views

Implement server serial key for server software

Me and my friend want to sell game server-side software, but we want some sort of control, over use of that software. For example, we want some sort of serial key system, so only verified/paid ...
7
votes
3answers
666 views

A safe license System

So I'm trying to think of a good way to check if the license key a user supplies for a program is legit or not. Let's suppose this is the way they get there license They make some type of purchase. ...