Win a copy of Machine Learning Bookcamp this week in the Artificial Intelligence and Machine Learning forum.And its a pity, because for companies, license keys have almost the same value as real cash.
Java Rsa Erator Not Available Software Is ReallyObfuscating 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.
You dont want every customer calling the technical support because they dont understand if the key contains a l or a 1. Your support department would thank you for this, and you will have lower costs in this area. ![]() The product should validate the license keys with the corresponding public key. This way, even if someone has full access to your products logic, they cannot generate license keys because they dont have the private key. A license key would look like this: BASE32(CONCAT(DATA, PRIVATEKEYENCRYPTED(HASH(DATA)))) The biggest challenge here is that the classical public key algorithms have large signature sizes. You dont 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. ![]() Basically, for a customer with a valid license key, you need to generate some activation data which is a signed message embedding the computers hardware id as the signed data. 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). ![]() Java Rsa Erator Not Available Verification Over TheNote 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.
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