As much as I wish it was unnecessary, we run a cryptocurrency platform. There are constant attempts to sign up using fake/stolen credentials, and we have to mak

As much as I wish it was unnecessary, we run a cryptocurrency platform. There are constant attempts to sign up using fake/stolen credentials, and we have to make sure our users don't fall prey to various attacks that could lead to total loss of their assets. Fingerprinting isn't the be-all and end-all and it's not 100% reliable, but it's extremely useful as part of a broad set of signals for detecting bad actors. The comparison to a physical address is silly - the address is the fingerprint. If I can meet you at your house, and obtain a legal document demonstrating that you own the house, I don't need to do anything else. There is no such equivalent for most internet-connected devices, or at least not one that's obtainable outside of law enforcement applications.