两步验证或两步身份验证是您可以添加到您的在线帐户的第二层安全保护，以阻止黑客入侵，即使他们知道您的密码。并非所有公司都提供此安全功能(security feature)，但幸运的是，Apple就是其中之一。如果您有Apple ID，您可以使用 iPhone、iPad 或 Mac(iPad or Mac)为您的Apple ID启用双重身份验证，这样更安全。如果您想了解如何操作，请阅读本指南：
注意：(Note:)在本教程中，我们使用的是装有 iOS 11.4.1 的 iPhone SE。如果您有其他iPhone 型号(iPhone model)、iPad 或Mac，情况可能看起来有些不同，但步骤基本相同。
什么是两步验证？
如果您想了解有关两步验证的更多信息，为什么要使用它以及为什么它让您更安全，您应该首先阅读这篇文章：什么是两步验证或两步验证(verification or two-step authentication)？
在Apple的生态系统中，两步验证是一个安全过程(security process)，涉及两个阶段，用于验证拥有 iPhone、iPad 或Mac并试图访问其Apple ID的人的身份。如果您启用两步验证，当您第一次尝试在新设备上连接您的Apple ID时，系统会要求您输入密码和一个六位数的验证码(verification code)，该验证码会自动显示在您的 iPhone、iPad 或麦克(iPad or Mac)。
之后在该设备上登录时，将不再要求您提供两步验证码(verification code)，除非您已注销、抹掉设备或您想更改Apple ID 密码(Apple ID password)。
请务必注意，一旦您为Apple ID(Apple ID)启用两步验证，您可能无法再禁用它。在 iOS 10.3 或更高版本中创建的某些帐户无法关闭双重身份验证。(Two-Factor Authentication)
现在让我们看看如何在iPhone 或 iPad(iPhone or iPad)上为您的Apple ID启用两步验证：
第 1 步。打开设置应用程序
您要做的第一件事是解锁您的iPhone 或 iPad(iPhone or iPad)，然后打开“设置”(Settings)应用。
步骤 2(Step 2)。找到密码和安全设置(Password & Security settings)
在“设置”(Settings)应用程序中，点击屏幕顶部的您的姓名。
然后，点击密码和安全(Password & Security)。
步骤 3(Step 3)。启用两步验证
点击“打开双重身份验证”。("Turn On Two-Factor Authentication.")
最后，点击继续(Continue)。
稍等片刻。
如果Apple决定不要求您提供任何其他附加信息，您应该会看到双因素身份验证(Two-Factor Authentication)现已启用。
就是这样！现在您的Apple ID使用两步验证，这意味着每次您想在不同的设备或网络浏览器上登录您的(device or web browser)Apple (iCloud) 帐户时，您的iPhone 或 iPad(iPhone or iPad)上都会自动获得一个验证码(verification code)。
当您在其他设备上首次登录Apple 帐户时，您在(Apple account)iPhone 或 iPad(iPhone or iPad)上看到的内容
当您尝试在网络浏览器或设备上登录您的(web browser)Apple 帐户(Apple account)时，您的 iPhone 或 iPad 设备应自动向您显示有关该登录请求的消息。如果是您，请点击允许(Allow)。消息如下所示：
一旦您允许登录尝试，您的iPhone 或 iPad(iPhone or iPad)还应该显示一个自动生成的六位数长的Apple ID 验证码。(Apple ID Verification Code)
您必须在您登录Apple 帐户(Apple account)的网络浏览器或设备(web browser or device)中输入两步验证码(verification code)。在网络浏览器(web browser)中，这看起来像下面的屏幕截图。
输入验证码(verification code)后，Apple会将您登录到您的帐户。
您是否对(Are)Apple ID使用两步验证？
我们希望我们的大多数读者对他们的重要帐户（包括他们的Apple ID(Apple ID)）使用两步验证。如果您使用Apple设备和服务，这是保护您的个人信息的最佳方法之一。在结束本教程之前，我们想知道您是否启用了两步验证，以及它对您的效果如何。在下面分享您的评论。
How to activate two-step verification for your Apple ID, on an iPhone or iPad
Two-step verificatiоn or two-step authentication is a second layer of security thаt you can add tо your online aсcоunts, to stop hackers from brеaking in, even if they know your password. Not all companies offer this seсurіty feature but, fortunately, Apple is one of them. If you have an Apple ID, you can use your iPhone, iPad or Mac to еnable two-factor authenticatiоn for your Apрle ID and be safer. If you want to learn how to do it, reаd this guide:
Note: For this tutorial, we used an iPhone SE with iOS 11.4.1. If you have another iPhone model, an iPad or a Mac, things might look a bit different but the steps are mostly the same.
What is two-step authentication?
If you want to learn more about two-step authentication, why you should use it and why it makes you safer, you should first read this article: What is two-step verification or two-step authentication?.
In Apple's ecosystem, two-step authentication is a security process that involves two stages for verifying the identity of a person who owns an iPhone, iPad, or Mac, and is trying to access his or her Apple ID. If you enable two-step authentication, when you try to connect to your Apple ID on a new device for the first time, you are asked to enter your password and a six-digit verification code that is automatically displayed on your iPhone, iPad or Mac.
On subsequent logins on that device, you are no longer asked for the two-step verification code unless you have signed out, erased the device or if you want to change your Apple ID password.
It is essential to note that once you enable two-step authentication for your Apple ID, you might no longer be able to disable it. Two-Factor Authentication cannot be turned off on some accounts created in iOS 10.3 or later.
Now let's see how to enable two-step authentication for your Apple ID, on an iPhone or iPad:
Step 1. Open the Settings app
The first thing you have to do is unlock your iPhone or iPad and then open the Settings app.
Step 2. Find the Password & Security settings
In the Settings app, tap on your name, at the top of the screen.
Then, tap on Password & Security.
Step 3. Enable two-step authentication
Tap on "Turn On Two-Factor Authentication."
Finally, tap on Continue.
Wait for a couple of moments.
If Apple does not decide to require any other additional information from you, you should see that the Two-Factor Authentication is now enabled.
That was it! Now your Apple ID uses two-step authentication, which means that every time you want to sign in to your Apple (iCloud) account on a different device or web browser, you automatically get a verification code on your iPhone or iPad.
What you see on your iPhone or iPad when you sign in to your Apple account for the first time on a different device
When you attempt to sign in to your Apple account in a web browser or on a device, your iPhone or iPad devices should automatically show you a message about that sign in request. If that is you, tap Allow. The message looks like this:
Once you allow the sign-in attempt, your iPhone or iPad should also display an automatically generated Apple ID Verification Code that is six digits long.
You have to enter the two-step verification code in the web browser or device on which you are signing in to your Apple account. In a web browser, this looks like the screenshot below.
Once you enter the verification code, Apple signs you into your account.
Are you using two-step authentication for your Apple ID?
We hope that most of our readers use two-step authentication for their important accounts, including their Apple ID. It is one of the best ways of securing your personal information if you are using Apple devices and services. Before closing this tutorial, we would like to know whether you have enabled two-step verification, and how well it works for you. Share your comments below.
