# 工作量證明（PoW）

> **最後更新：2026 年 1 月**

## 第一個加密貨幣的成功關鍵

工作量證明(Proof-of-Work或是PoW)是讓比特幣開拓加密貨幣領域的關鍵。在比特幣之前有許多電腦科學家嘗試解決區塊鏈上常見的[女巫攻擊](/ren-shi-feng-xian-bao-hu-zi-chan/sybil-attack.md)，不過都以失敗告終，無法阻止這種一台電腦製造大量複製身份，來投出大量假票對網絡[共識](/qu-kuai-lian-ru-he-da-cheng-gong-shi/consensus.md)的攻擊。

比特幣發明人[中本聰](/cong-zhong-ben-cong-dao-bi-te-bi/satoshi-nakamoto.md)提出：“Okay fine. 我們不再是一個身份一票，現在是一顆GPU一票！”這樣的作法大幅提升創建假身份的難度。以往創建一個假身份可能僅需要0.00001台幣，現在一個身份就要花上10000台幣(要看GPU有多貴)，大幅減低女巫攻擊的效益。

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#### 相關條目

* [權益證明（PoS）](/qu-kuai-lian-ru-he-da-cheng-gong-shi/consensus/pos.md)
* [委託權益證明（DPoS）](/qu-kuai-lian-ru-he-da-cheng-gong-shi/consensus/dpos.md)

#### 參考資料


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