#Where is it serial key serial number#

You can also find your serial number using your software, provided your USB hardlock key is installed on your computer or network as follows. It is also included on the tag attached to your blue (standard) or red (network) USB hardlock key.

#Where is it serial key software#

Indeed, even for RSA, the signature and encryption operations become dissimilar once you start considering details like padding, which are essential if you want to turn the basic 'textbook RSA' algorithm into something that can actually be used as a secure and practical cryptosystem.Your software serial number can be found in the letter included with your software shipment. However, for most other public key cryptosystems, no such duality holds: generically, digital signature schemes are completely different from public key encryption schemes (although they're often based on similar mathematical problems).

#Where is it serial key verification#

What generally confuses people who first encounter digital signatures in the form of RSA signatures is that the RSA cryptosystem is kind of unusual, in that the same basic algorithm can be used for both public-key encryption and for digital signatures, and, at a low level, the two operations are kind of dual, such that the RSA signature operation can be viewed as 'encrypting with the private key' and the signature verification as 'decrypting with the public key' (which is the opposite of what you'd do for normal public-key encryption). You could also try other signature schemes with short signatures, like Schnorr signatures or possibly something like the McEliece-based signature scheme described in this paper, but even these might be a tight fit for a user-typeable license key. Basically, you're going to have a tradeoff between security and usability. You can reduce the signature length by reducing the security level, but then it becomes possible to forge the signatures by brute force. Now, the bad news is that, unfortunately, an ECDSA signature with a non-trivial security level is still pretty long for a license key. You can also use the same scheme for product activation keys in this case, the data you'd be signing wouldn't be just a serial number, but some kind of digest string identifying the user and possibly some features of the system they're installing the software on. When the number is entered by the user, the software checks that the signature is valid using its public key.

#Where is it serial key serial key#

Your serial key will consist of a simple serial number, plus a signature of that number using the private key.

What you need is an elliptic curve digital signature scheme, such as ECDSA.Д«asically, your key generation server will hold the private half of the keypair, while the software you distribute will contain the public half. What is the correct way to do this? Do I miss the correct scheme for this? It can't be ECDSA, it can't be ECIES. And the keys they show in the screenshot are very short: For 128 Bit keys only around 30 characters. What I am really looking for is a solution similar to where they use the right concept: The private key to generate the serial and the public key to verify them. But this results in a large serial number. The next idea would be to just encode the information arbitrarily and append a signature based on ECDSA to it. However, knowing the domain parameters and the private key, it is easy to derive the public key for ECIES, right? The public key is used to encrypt (generate the serial) whereas the private key is in the application and used to decrypt. However, I see no benifit in this: They choose domain parameters which needs to be known by the app and the creator. Therefore I want to build something similar on my own. However, this is based on RSA resulting in large numbers. The initial idea is from where they can create serials where information is encrypted.

What I want to do is to encode information in the serial which can be publicly verified but only created by me. I want to (or created) serial keys based on elliptic key cryptography.