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Free java license key generator
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No PayPal account necessary to donate via credit card. Bits are used when there will be more fields and the encoding will be harder to decipher. This method traverses the list of registered security Providers, starting with the most preferred Provider.
September September 29, 2015: Someone actually playing with the glad program uncovered a few bugs leading to the creations of Version 2. Hint: If you can wait, current year calendars are usually on sale in January. At this time I am not sure if you need it since you have NUMBER available to use. For documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples. Key license number of Kaspersky Anti-Virus 2014 is developed first of all for you to get technical support from Kaspersky Lab experts by e-mail or by phone. But, I piece: this won't prevent piracy I have recently read that this approach is not cryptographically very sound. SolidLicense is delivered as libraries that you may include in your software statically or dynamically. Parameters: algorithm - the standard name of the requested key algorithm.
Two types of templates are Bytes and Bits. Below is a screen shot of sample key definition input parameters and encryption key generation left side and test controls for building and decoding License Keys for a specific license right side. For the library part, I ran FxCop routinely to make sure many of the best practices are adhered to. Bits are used when there will be more fields and the encoding will be harder to decipher.
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I'm currently involved in developing a product developed in C that'll be available for downloading and installing for free but in a very limited version. To get access to all the features the user has to pay a license fee and receive a key. I guess I should also tie the key to the version of application somehow so it'll be possible to charge for new keys in feature versions. Anything else I should think about in this scenario? Caveat: you can't prevent users from pirating, but only make it easier for honest users to do the right thing. But, I repeat: this won't prevent piracy I have recently read that this approach is not cryptographically very sound. But this solution is already weak as the software itself has to include the secret key somewhere , so I don't think this discovery invalidates the solution as far as it goes. Just thought I really ought to mention this, though; if you're planning to derive something else from this, beware. I would think that by the time someone is hacking your code possibly at the assembly level to find your secret key, they are probably also at the level that they can just bypass your checks entirely. I don't think there's a method of registration so secure that it can survive a good hacker running the program locally. As the original comment said, it's really all about anything that makes it one step harder than simply copying the file. A lot of games these days have given up on copy protection and simply take the game content online, in which case the code is out of the hacker's hands. And it's a pity, because for companies, license keys have almost the same value as real cash. Obfuscating the algorithm or hiding an encryption key within your software is really out of the question if you are serious about controlling licensing. If your product is successful, someone will make a key generator in a matter of days from release. Your support department would thank you for this, and you will have lower costs in this area. So how do you solve these challenges? The signatures should be part of the license key. The product should validate the license keys with the corresponding public key. This way, even if someone has full access to your product's logic, they cannot generate license keys because they don't have the private key. RSA512 has an 1024-bit signature. You don't want your license keys to have hundreds of characters. One of the most powerful approaches is to use elliptic curve cryptography with careful implementations to avoid the existing patents. ECC keys are like 6 times shorter than RSA keys, for the same strength. This is usually done over the internet, but only ONCE: the product sends the license key and the computer hardware id to an activation server, and the activation server sends back the signed message which can also be made short and easy to dictate over the phone. From that moment on, the product does not check the license key at startup, but the activation data, which needs the computer to be the same in order to validate otherwise, the DATA would be different and the digital signature would not validate. Note that the activation data checking do not require verification over the Internet: it is sufficient to verify the digital signature of the activation data with the public key already embedded in the product. Split the license key string into groups of characters. Besides what has already been stated.... NET applications are inherently breakable because of the intermediate language issues. A simple disassembly of the. NET code will open your product to anyone. They can easily bypass your licensing code at that point. You can't even use hardware values to create a key anymore. Virtual machines now allow someone to create an image of a 'licensed' machine and run it on any platform they choose. If it's expensive software there are other solutions. If it's not, just make it difficult enough for the casual hacker. And accept the fact that there will be unlicensed copies out there eventually. If your product is complicated, the inherent support issues will be create some protection for you. NET engine we use for licence key generation is now maintained as open source:. You create the keys your self, so the licence implementation is unique to your software. As stated above, if your code can be decompiled, it's relatively easy to circumvent most licencing systems. The only way to do everything you asked for is to require an internet access and verification with a server. The application needs to sign in to the server with the key, and then you need to store the session details, like the IP address. This will prevent the key from being used on several different machines. This is usually not very popular with the users of the application, and unless this is a very expensive and complicated application it's not worth it. You could just have a license key for the application, and then check client side if the key is good, but it is easy to distribute this key to other users, and with a decompiler new keys can be generated. I've implemented internet-based one-time activation on my company's software C. The software hits the server with the key and is given license information that is then encrypted locally using an RSA key generated from some variables a combination of CPUID and other stuff that won't change often on the client computer and then stores it in the registry. It requires some server-side coding, but it has worked really well for us and I was able to use the same system when we expanded to browser-based software. It also gives your sales people great info about who, where and when the software is being used. Any licensing system that is only handled locally is fully vulnerable to exploitation, especially with reflection in. But, like everyone else has said, no system is wholly secure. In my opinion, if you aren't using web-based licensing, there's no real point to protecting the software at all. With the headache that DRM can cause, it's not fair to the users who have actually paid for it to suffer. You'd have to first have a decrypted legitimate license as a baseline and then either somehow figure out how the encryption is being done locally and generate a valid license and then encrypt it using the correct seed or use some kind of clever buffer overflow hack to bypass the activation routines. In the past, I've used many times, because it fullfills this requirements and offers really good price. It uses the same license protection for end users and itself and noone cracked that until now. You can also find good tips on the website to avoid piracy and cracking. Like a few others mentioned, I'm a huge opponent of being hostile to customers by default—something that the licensing industry is notorious for. So I'll expand on a good solution for your problem that also offers a good customer UX. So what you're looking for are feature licenses for your product e. I built with this type of licensing in mind. What I would do is set up 2 license types a policy within Keygen where one is a base policy for the limited free version, and the other is a policy for the paid version. I'm not sure what you're using for payments, but let's assume you're using something like Stripe pretty standard nowadays that offers webhooks. Keygen also has webhooks whether you use it or not, all this is still applicable. You can integrate Keygen to talk with your payment provider using webhooks from both sides think: customer. So by utilizing webhooks, we can automate license creation for new customers. So what about license validation within the application itself? This can be done in a variety of ways, but the most popular way is by requiring your customer to enter a long license key into an input field which you can then validate; I think this is a terrible way to handle license validation in your application. Why do I think that? Well first off, you're requiring your customer to input a tediously long license key that is meant for machine consumption, and second your requiring you and your customer to keep track of said tediously long license key. Okay, so what's an alternative? You can then associate all of their licenses and their machines with that account. So now instead of inputting a license key, they can simply log in using their credentials. What advantage does that give you? Firstly, it gets rid of the need for you and your customers to keep track of license keys, since it's all handled behind-the-scenes inside of their user account and most importantly: you can now offer your customers self-serve license and machine activation! And since your application is now self-serve, you can allow your customers to purchase additional features directly from within your application! So we've introduced a ton of automation to our licensing system, we can license individual features i. Anyways, this got long but hopefully it helps somebody! You can use a free third party solution to handle this for you such as Quantum-Key. Net It's free and handles payments via paypal through a web sales page it creates for you, key issuing via email and locks key use to a specific computer to prevent piracy. A good free code obfuscator is ConfuserEx wich is fast and simple to use and more effective than expensive alternatives. You should run your finished software through De4Dot and. NetReflector to reverse-engineer it and see what a cracker would see if they did the same thing and to make sure you have not left any important code exposed or undisguised. Your software will still be crackable but for the casual cracker it may well be enough to put them off and these simple steps will also prevent your code being extracted and re-used.