The Advent of Digital Ownership
This lesson explains how digitization makes information easy to copy, and how public cryptographic networks use shared databases and cryptography to solve the double-spending problem, enabling individuals to directly control their digital assets and online identities.
From Physical Ownership to Digital Media
Traditional ownership primarily applies to physical objects such as cars and houses. Receipts, titles, or deeds can prove the ownership relationship between a person and an item. Although books, records, and compact discs contain content, purchasers generally own only the physical medium and the right to use it; they do not thereby acquire ownership of the works it contains or the right to freely copy and distribute them.
Digital Copying and Double-Spending
Computers and the Internet allow digital information, including text, audio, and video, to be copied rapidly and inexpensively around the world. Money, however, cannot be copied at will: if the same unit of digital currency could be duplicated and spent multiple times, the ledger would lose its credibility. This is known as the double-spending problem, and it is a core challenge that cryptocurrency networks must solve.
Individual Control Through Public Networks
Public networks such as Bitcoin and Ethereum use open, shared, decentralized databases and cryptography to enable participants to maintain a consistent record of asset ownership and transaction states. Wallets such as MetaMask do not hold digital goods on users' behalf; instead, they provide a means of access that allows users to directly control their assets and identities on public networks.
Original Tutorial
https://learn.metamask.io/zh-CN/lessons/the-advent-of-digital-ownership
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