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- To create the certificate and private key for our own certificate authority we first need to set caconf.cnf (the file we just created) as OpenSSL’s configuration file. A quick way to do that is to set the path to the caconf.cnf file in the OPENSSL_CONF environment variable.
- The serial number is 888F89E88F88-8V88TW8, please enter just '8V88TW8' in the 'SN/Virtual Device Identifier' box. Enter the correct ' Send To ' email address to receive the license key file. Enter the ' End User ' information for this request.
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The commercial software my company creates and sell currently uses a Base-64 encoded RSA-encrypted license key. The result is roughly 90 characters long. It is bulky and awkward to use, and prone to user error. Some users don't understand copy and paste very well and try to manually type the key.
I'd like to replace the current algorithm with an approach that creates a smaller key, such as the 30-characters keys I see some other programs use. Furthermore, I notice that many software vendors use keys that only use digits and upper-case characters, making them even less cumbersome to use.
What algorithm can I use to generate reasonably secure keys that embed username, product id, and version number, where the resulting license key is no longer than 30 characters and uses only digits and upper-case characters?
Create Serial Key From Username Generator
(If important, we're coding in Java.)
So..here's a start:
Steve McLeod
Steve McLeodSteve McLeod
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closed as too broad by JasonMArcher, Mogsdad, Peter Pei Guo, Shankar Damodaran, Jim GarrisonJun 12 '15 at 4:20
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2 Answers
I followed the links mentioned in fcm's answer, and that led me to a possibility. You'll need Google's Guava libraries in your Java classpath:
Steve McLeodSteve McLeod34.2k3838 gold badges114114 silver badges164164 bronze badges
For something so specific, you'll probably have to generate your own algorithm, comprising the required information into the hash in a way only your software would 'understand'.
Take the info (username, id, version), add a secret salt to it, to add an extra layer of security.
You have the right idea with your code so far, but just there's not much set in stone in regards of specific keys.
Take a look at similar questions like this and this for more information on the subject.
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