bitcoin double spend - Double spending example - 比特幣起源

Understanding Double-Spending and How to Prevent Attacks

Double-spending is spending the same cryptocurrency or blockchain token more than once. Cryptocurrency is a token that represents value on a distributed ledger.

What Is the Double Spend Problem?

The Double Spend problem is about preventing digital money duplication. Learn how Bitcoin solves this issue without relying on central authorities.

What is Double Spending in Blockchain?

Double spending means the expenditure of the same digital currency twice or more to avail the multiple services.

What is the double spend problem?

The double-spend problem is a potential issue in digital cash systems where the same digital token can be spent more than once.

How Does a Blockchain Prevent Double-Spending of

Bitcoin's blockchain prevents double-spending by using timestamps, proof that work was done, a network of nodes with copies of the blockchain, 

雙重支付- 維基百科，自由的百科全書

雙重支付（又稱一幣多付、雙花攻擊，double-spending）是同一筆數位貨幣可以被重複花用兩次或更多次的情形，是一種數位貨幣失敗模式的構想。因為數位貨幣是採取電子檔案的