什麼是開放授權(OAuth)?

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什麼是開放授權(OAuth)?

OAuth 是一種開放標準協議,可讓您向其他應用程式授予對資源或資料的存取權限,而無需共用您的登入憑證。它為您提供了一種安全的方式來授權其他應用程式存取您在各種網站或服務上的資訊。

OAuth 是如何運作的?

當您想要使用支援 OAuth 的服務時,請先透過點擊該服務提供的登入按鈕來啟動身份驗證程序。這會將您重新導向到授權伺服器,您可以在其中輸入登入憑證。一旦您通過身份驗證,伺服器就會產生一個唯一的令牌(稱為存取權杖),並將其發送回您嘗試使用的應用程式。

什麼是訪問令牌?

存取權杖是一種憑證,代表您存取特定資源或在網站或服務上執行某些操作的授權。它充當臨時金鑰,允許應用程式代表您發出請求,而無需您的使用者名稱和密碼。存取權杖通常包含在從應用程式傳送到伺服器以存取受保護資源的超文本傳輸協定 (HTTP) 請求中。

OAuth 涉及哪些角色?

在OAuth中,主要有三個角色:資源擁有者、客戶端和授權伺服器。資源擁有者是您,也就是擁有資源或資料的使用者。客戶端是想要存取您的資源的應用程式或服務。授權伺服器是對您進行身份驗證並向用戶端頒發存取權杖的伺服器。

OAuth 中授權伺服器的用途是什麼?

授權伺服器在 OAuth 中起著至關重要的作用。它充當可信的責任,負責驗證您的身份並驗證您的身份。一旦您通過身份驗證,伺服器就會產生並向客戶端頒發存取權杖。它還確保客戶端有權代表您存取所要求的資源。

身份驗證和授權有什麼區別?

身份驗證是驗證您的身份並確保您是您所聲稱的身份的過程。它通常涉及提供您的用戶名和密碼。另一方面,授權是根據您經過身份驗證的身份授予或拒絕對特定資源或操作的存取的過程。在 OAuth 中,授權伺服器處理身份驗證和授權。

使用 OAuth 對開發人員有什麼好處?

透過使用 OAuth,開發人員可以使他們的應用程式能夠存取來自各種服務的用戶數據,而無需用戶共享其密碼。這增強了安全性和用戶隱私。它還減輕了開發人員安全處理和儲存使用者憑證的負擔。

OAuth 如何保護我的憑證?

OAuth 透過消除與其他應用程式共用憑證的需求來保護您的憑證。您無需直接提供使用者名稱和密碼,而是授權應用程式透過存取令牌存取您的資源。這可確保您的登入憑證不會因與多個應用程式共用而面臨潛在的安全風險。

OAuth 中的範圍是什麼?

OAuth 中的範圍定義用戶端應用程式要求的特定權限或存取權限。當您授權應用程式時,您會看到一個範圍列表,指示應用程式想要存取哪些操作或資源。透過授予不同的範圍,您可以控制應用程式可以存取資料的哪些部分。

我可以撤銷透過 OAuth 授予的存取權限嗎?

是的,您可以撤銷透過 OAuth 授予應用程式的存取權限。大多數服務都為您提供了一種管理授權應用程式並根據需要撤銷其存取權限的方法。透過這樣做,與應用程式關聯的存取權杖將變得無效,並且它無法再存取您的資源。

OAuth 能否用於單一登入 (SSO)?

是的,OAuth 可用於 SSO 場景。 SSO 允許您登入一次,然後存取多個應用程式或服務,而無需重新進行身份驗證。 OAuth 可以透過在不同應用程式之間交換身分驗證和授權資訊來促進 SSO,從而允許跨多個系統進行無縫存取。

OAuth 與 openID connect 相同嗎?

不,OAuth 和 openID connect (OIDC) 相關,但用途不同。 OAuth 專注於授權和存取委託,允許應用程式代表使用者存取資源。另一方面,OIDC 是建構在 OAuth 之上的身份層,並提供身份驗證功能。除了授權之外,它還允許應用程式獲取有關用戶身份的資訊。

常見的 OAuth 授權類型有哪些?

OAuth支援不同的授權類型來滿足不同的場景。一些常見的授予類型包括授權代碼授予、隱式授予、客戶端憑證授予和資源所有者密碼憑證授予。根據應用程式的要求,每種資助類型都有其特定的用例和注意事項。

OAuth 如何處理行動和桌面應用程式?

對於行動和桌面應用程序,OAuth 提供適合這些環境的特定授權類型。行動應用程式通常使用具有代碼交換證明金鑰 (PKCE) 的授權代碼授予來安全地取得存取權杖。桌面應用程式也可以利用授權程式碼授予,並且某些平台提供特定的程式庫或框架來簡化 OAuth 整合過程。

OAuth 安全嗎?

OAuth提供了一個安全認證和授權的框架,但其安全性也依賴於服務提供者和開發人員的實作。正確實施 OAuth 可以透過減少使用者憑證的暴露來增強安全性,但必須確保授權伺服器和用戶端應用程式遵守最佳實務並遵循安全準則。

使用 OAuth 時如何保護自己?

以下是在使用 OAuth 時增強安全性的一些提示:

檢查應用程式權限:在授權應用程式之前,請仔細檢查請求的權限或範圍。僅授予應用程式運行所需的必要存取權限。

驗證應用程式真實性:確認您授權的應用程式來自可信任來源。檢查應用程式的聲譽,閱讀評論,並確保應用程式的網站或下載連結合法。

使用強而獨特的密碼:使用強而獨特的密碼保護您的帳戶。避免在不同的服務中重複使用密碼,以防止未經授權的存取您的帳戶。

啟用雙重認證:盡可能使用雙重認證 (2FA) 為您的帳戶新增額外的安全層。即使您的憑證遭到洩露,這也有助於防止未經授權的存取。

定期查看授權應用程式:定期查看授權應用程式列表,並撤銷您不再使用或信任的任何應用程式的存取權限。這有助於最大限度地減少潛在的攻擊面。

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