新增一個額外的安全層從來都不是壞事,但是您可能會發現自己在想從該層中實際獲得的好處。今天的超級使用者問答文章解釋了是什麼使得“安全登入”對於好奇的讀者來說是安全的。
今天的問答環節是由SuperUser提供的,SuperUser是Stack Exchange的一個分支,是一個由社群驅動的問答網站分組。
圖片由馬特·比杜爾夫(Flickr)提供。
超級使用者讀者Nexusfactor想知道什麼使安全登入(Ctrl+Alt+Del)安全:
I was reading about enabling Ctrl+Alt+Del (link) as a security measure when logging in. My question is, what exactly is secure about it? What goes on “behind the scenes” that makes it safe from viruses and spyware?
什麼使安全登入(Ctrl+Alt+Del)安全?
超級使用者貢獻者杜德和路易斯為我們找到了答案。首先,夥計:
Secure is the fact that Ctrl+Alt+Del is the only key sequence that an operating system will never allow to be redirected. No third party application can respond to this key combination to fake a login window and/or keylog your password for example.
接著是路易斯的回答:
duDE explains how Ctrl+Alt+Del guarantees that a legitimate login desktop will be displayed and how the guarantee benefits security. I will try to answer the second part of your question by explaining that the true safety is provided by the concept of a secure desktop, for which the key combination is just a guarantee of enjoying that security.
In Windows, there are actually different types of desktops. The one that we work in is what we all call the desktop, but has been known by other names such as default, interactive, or application desktop. It is here that any given application can run.
The login screen is actually an entirely different kind of desktop, a secure desktop where only trusted processes are running as SYSTEM. While the key combination will guard against fake login screens, it does not protect against a virus infection that is keylogging all of your keystrokes. The desktop concept adds further protection here by not allowing such a background program access to what is happening on the secure desktop.
You can picture this isolation by remembering what happens to the default desktop when UAC prompts appear. You will notice that UAC prompts are actually in one of these secure desktops.
You can also imagine what the isolation means in terms of security when c***idering a virus that spoofs your mouse pointer. The UAC team blogged about such a scenario:
有什麼要補充的解釋嗎?在評論中發出聲音。想從其他精通技術的Stack Exchange使用者那裡瞭解更多答案嗎?在這裡檢視完整的討論主題。
...覽過Windows工作管理員,想知道其中的一些條目是用來做什麼的?Windows系統程序部分位於Windows 10工作管理員列表的底部,其中包含一些對計算機正常執行至關重要的程序。 ...
...是,直接在瀏覽器中自動執行這些任務更容易,這就是為什麼我更喜歡為每個瀏覽器單獨設定它的原因。 ...
...上下文選單中。安裝後,只需右鍵單擊鎖定的檔案並選擇什麼是鎖定此檔案?這將開啟一個視窗,顯示使用該檔案的所有程序。現在可以選擇解除鎖定、刪除(下次系統重新啟動時)或解除鎖定並重命名檔案。在我們的例子中,...
...順序、系統時間和日期,或者啟用的硬體元件。這就是為什麼BIOS(基本輸入/輸出系統)也稱為“設定”。 ...
...rl+Shift+M組合鍵Cmd+Shift+M開啟“使用者”選單以其他人身份登入網頁導航Ctrl+加號(+)命令+加號(+)放大Ctrl+減號(-)命令+減號(-)縮小Ctrl+0(零)Cmd+0(零)將縮放重置為100%11層Cmd+Ctrl+F鍵切換全屏模式Ctrl+F鍵命令列+F搜尋當前...
...個地方收集了許多方便的實用程式。但是在Mac上按這些鍵什麼也做不了,那麼在Mac上如何按Ctrl+Alt+Delete呢? ...
... 但是如果忘記了windowsxp密碼會發生什麼呢?你是不是永遠被鎖在WindowsXP帳戶之外了? ...