How are steam keys generated?
1. Randomly generate a key and if it's taken, generate another one and loop.
2. There is a database of (millions) available keys, when it runs out make more with step 1....
@nprofile1q... Almost certainly a cryptographic hash (probably SHA-3) using a private key that they keep locked up tight. They've changed the key lengths in the past, that was probably caused by switching algorithms