Satoshi used simple public-private key pairs as “addresses” and “passwords” for wallets, but the same concept applies to any digital identity; people, devices, apps, smart contracts, etc

This is the value that decentralized digital identity (aka web3) is truly offering… a shared trust anchor that will enable digital identities to interoperate better than the walled gardens of today’s cloud providers, saas apps, and app stores’ identity registries.

The point of cryptography is to reduce secrecy to a key distribution problem.

Blockchain has solved the key distribution problem without need for a central authority.