Goodness is hard to measure. More so in the field of Cybersecurity. In the physical world, if you possess something, say a $1 bill, you have it. If you spend it, you don’t have it. If someone steals it, you don’t have it, either. The digital world is quite different. Digital copies are the same as the original – exactly the same. Each replicated copy is at least as original as the original original. “Can you send me a copy?” can only be answered, “No, but I can send you an original.”
You know all that.
A non time-sensitive digital asset that could be infinitely replicated was itself of little value. It could be replicated many times and in theory “spent” many times. But of course, there were no buyers. Enter cryptocurrency, Bitcoin for an obvious example. A Bitcoin aspires to be a digital $1 bill that can neither be double-spent nor infinitely replicated. How do those two miracles occur? Blockchain.
