Public-Key Cryptography
How Two Keys Changed Everything
How can two people who've never met exchange secret information over an open network? It's a question that sounds impossible until you see the answer: public-key cryptography.

How Two Keys Changed Everything
How can two people who've never met exchange secret information over an open network? It's a question that sounds impossible until you see the answer: public-key cryptography.

How a Blockchain Stays Honest
In my last post, I covered what a blockchain is conceptually: a distributed ledger that enables trust without a central authority. Now I want to dig into how it actually works. Understanding the mechanics helps explain why the system is hard to cheat.

A Distributed Ledger Without a Central Authority
I've been digging into blockchain lately, trying to get past the hype and understand what the technology actually does. The term gets thrown around a lot, usually in the same breath as cryptocurrency, but the underlying system is worth understanding on its own.
