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1 licence key for 1 user, or 1 licence key for 1 user application id combination.

A seed that is unique to the context in which a key is being generated, e.g.

You are responsible for choosing a random set of bytes to use as your 'keys'

A set of arbitrary 'key' bytes that are unique to the application that we want to protect.

To generate a licence key we essentially need two things: WriteLine( ' Press any key to verify another licence key. WriteLine( $'Verification result: ') Ĭonsole. If the key has been correctly copied, then the key should be reported as valid. Add blacklisted seeds here if required (these could be user IDs for example) blackListedSeeds: null The TOTAL number of KeyByteSets used to generate the licence key in SampleKeyGenerator totalKeyByteSets: 8, Var pkvKeyVerificationResult = pkvKeyVerifier. Var pkvKeyVerifier = new PkvKeyVerifier() WriteLine( 'Enter the key generated from the running instance of SampleKeyGenerator: ') Enter the key generated in the SampleKeyGenerator console app Console.

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This is so // the full set of KeyByteSets is not being compiled into your distributable application code and you have the option // of changing the KeyByteSets that are verified. In your application that is to be distributed to the end user (which needs to verify the licence // key), only include a subset of the full keyByteSets array used in SampleKeyGenerator. Verifying the licence key generated in the above sample code can be achieved as below:

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} Licence Key Verification Application Sample WriteLine( ' Press any key to generate another licence key. WriteLine( ' Copy these values to a running instance of SampleKeyVerification to test key verification. The values output can now be copied into the SampleKeyVerification console app to demonstrate // verification. WriteLine( 'Generated licence key is: ') var pkvKeyGenerator = new PkvKeyGenerator() WriteLine( 'Seed (for example user ID) is: ') This value could be a user ID or something // else depending on your application logic. A unique key will be created for the seed value. New KeyByteSet( keyByteNumber: 8, keyByteA: 6, keyByteB: 88, keyByteC: 32) New KeyByteSet( keyByteNumber: 7, keyByteA: 89, keyByteB: 45, keyByteC: 142), New KeyByteSet( keyByteNumber: 6, keyByteA: 200, keyByteB: 56, keyByteC: 49), New KeyByteSet( keyByteNumber: 5, keyByteA: 62, keyByteB: 4, keyByteC: 234), New KeyByteSet( keyByteNumber: 4, keyByteA: 2, keyByteB: 93, keyByteC: 41), New KeyByteSet( keyByteNumber: 3, keyByteA: 11, keyByteB: 185, keyByteC: 69), New KeyByteSet( keyByteNumber: 2, keyByteA: 96, keyByteB: 254, keyByteC: 23), New KeyByteSet( keyByteNumber: 1, keyByteA: 58, keyByteB: 6, keyByteC: 97), You should change these values in your solution. Here in SampleKeyGenerator is the full set of KeyByteSet used to generate the licence key. In your application that is responsible for generating the licence keys, reference the NuGet package. NET standard, will vary significantly from the samples included below and will not be maintained going forward. NET Framework 2.0 version is retained in this repository under /legacy-netfx but be aware that the API was changed in the port to. NET Standard implementation support see: This means that this library can be used with:įor full.

Light weight and fast code execution, tested up to 1,000,000 key generation and verification cycles in 10.2 seconds.

Compiled key verification code cannot be fully reproduced to allow the creation of a key generator (keygen) as full key data is not required for verification.

Ability to revoke licence keys if keys found to have been distributed without authorisation.

No 'Phone Home' to verify licence keys is required.

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NET Licence Key Generator implements a 'Partial Number Verification System', which along with other features, provides a defence against key generators which may be built to attempt to crack your licence key system.Ĭredit to Brandon Staggs who wrote this article on implementing a partial number verification system in Delphi, from which this C# borrows: Key benefits of implementing your licence system with the.

NET Licence Key Generator provides a robust, lightweight and tested means of solving this problem.

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NETĪ common requirement for software vendors is the inclusion of a system for generating and verifying passwords, which can be bundled with distributed desktop software, or for granting access to online services. NET Licence Key Generator Licence Key Generation and Verification for.