Blockchain technology prevents the digital replication of assets, solving the classic computer science problem of double-spending.

In the digital world, assets are easily copied, just like a digital photo. If you send a digital dollar, you could easily keep a copy and spend it again. Blockchain solves this puzzle by creating a shared, unalterable history. Because every node on the network keeps an identical, timestamped record, the system immediately spots and rejects any attempt to spend the same asset twice.