The key idea is simple: Spark doesn’t move bitcoin on-chain between users. It replaces who holds the valid authorization to ...

For most of us, bitcoin is more than a little confusing. Does it work like real money? Is it physical or only online? And how do you even use it? Cryptocurrency is still fairly new and still very ...

WIRED has been reporting on digital currency Bitcoin for several years, but in the past few months, a single bitcoin's trading value has swung significantly making it a regular fixture in headlines.