Why are On-Chain Addresses So Strange? What is the Relationship Between Wallets, Seed Phrases, Private Keys, and Public Keys?

Explains the relationship between wallet addresses, private keys, public keys, and seed phrases, illustrating the underlying logic and security mechanisms of on-chain identity.

{{{##anchor=preface}}} Preface If you show a Web3 wallet address to a newcomer, they often gasp: a string of unintelligible hexadecimal characters that looks like gibberish or a keyboard error. Then come concepts like "seed phrase, private key, public key," and the confusion deepens. Why can't we just log in with a phone number and SMS like a bank? Why do twelve random words unlock a fortune? This confusion is natural because the on-chain identity system is fundamentally different from the centralized bank systems we’ve used for decades. Here, identity isn't certified by an institution; it's supported by a mathematical structure. You own assets not because a bank says so, but because your private key signature proves it. To stand firm in this world, you must understand four key concepts: Private Key, Public Key, Address, and Seed Phrase. {{{##anchor=part-1.2}}} 1. What is a Wallet? It Doesn’t 'Hold Money,' It 'Holds Keys' A traditional wallet holds cash. A digital wallet in Web2 holds a balance in a database (like PayPal). But a blockchain wallet holds keys . Assets do not live in your phone or on a platform's server; they live on the public ledger (the blockchain). The wallet's ro