Chapter 1: The Digital World and Its Hidden Dangers / 第一章：数字世界及其隐藏的危险

Chapter 1: The Digital World and Its Hidden Dangers

第一章：数字世界及其隐藏的危险

Opening: The Question That Started Everything

开篇：一切的开始源于一个问题

*What makes our digital world need protection? What exactly is cybersecurity?*

*是什么让我们的数字世界需要保护？网络安全到底是什么？*

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Imagine waking up one morning, reaching for your tablet to play your favorite game, and seeing a strange red lock icon on the screen. All your saved progress, all your carefully collected in-game treasures—they're all locked away. A mysterious message demands something called "bitcoin" to unlock them. This isn't a fairy tale. In May 2017, this nightmare became reality for hundreds of thousands of people around the world.

想象一下：一个清晨，你伸手去拿平板电脑，想玩你最喜欢的游戏，却发现屏幕上出现了一个奇怪的红色锁图标。你所有保存的进度、所有精心收集的游戏宝藏——全都被锁住了。一条神秘的信息要求你支付一种叫做"比特币"的东西才能解锁。这不是童话故事。2017年5月，这场噩梦成为了全世界数十万人的现实。

The event was called WannaCry—a ransomware attack that spread like wildfire across 150 countries. Hospitals in the United Kingdom couldn't access patient records. Police stations in the United States found their evidence files encrypted. Universities in China lost years of research data. Normal people's computers, tablets, and phones were held hostage. The attackers demanded $300 to $600 in digital currency to restore access. Many victims paid, hoping to recover their files. Some never got their data back.

这个事件被称为"想哭"（WannaCry）——一种像野火一样蔓延到150个国家的勒索软件攻击。英国的医院无法访问病人记录。美国警察局的证据文件被加密。中国的大学失去了多年的研究数据。普通人的电脑、平板和手机被扣为人质。攻击者要求支付300到600美元的电子货币来恢复访问权限。许多受害者付了钱，希望能恢复他们的文件。有些人再也没能找回他们的数据。

This is what happens when our digital world isn't properly protected. This is why cybersecurity matters.

这就是当我们的数字世界没有得到适当保护时会发生的事情。这就是网络安全重要的原因。

But before we can understand how to protect ourselves, we need to understand the world we're protecting. How does information travel from your device to your friend's device on the other side of the world? What exactly happens when you type a website address and press enter? And why do some people try to break into these digital connections while others work to keep them safe?

但在我们能够理解如何保护自己之前，我们需要先了解我们正在保护的这个世界。信息是如何从你的设备传送到世界另一端你朋友的设备的？当你输入一个网站地址并按下回车键时，到底发生了什么？为什么有些人试图闯入这些数字连接，而另一些人则致力于保护它们的安全？

Our guide through this journey is Little Ming（小明）—an eleven-year-old who just received his first computer. Like you, Little Ming is curious, eager to learn, and excited about the amazing things technology can do. But Little Ming is about to discover that the digital world, just like the physical world, has its dangers. And the first step to staying safe is understanding what we're dealing with.

我们这次旅程的向导是小明——一个刚收到他第一台电脑的11岁孩子。像你一样，小明充满好奇心、渴望学习、对科技能做的神奇事情感到兴奋。但小明即将发现，数字世界就像现实世界一样，也有它的危险。保持安全的第一步就是了解我们在面对什么。

So let's begin where Little Ming began—with a box, a new computer, and one very important question:

所以让我们从小明开始的地方开始——一个盒子、一台新电脑，以及一个非常重要的问题：

> *How does my computer talk to the whole world?*

> *我的电脑是如何与整个世界对话的？*

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Section 1: The Digital Universe Surrounding You

第一节：你周围的数字宇宙

Understanding Digital Devices in Daily Life

理解日常生活中的数字设备

When Little Ming opened the box containing his new computer, he found more than just the machine itself. Alongside the computer were cables, a small rectangular device with blinking lights, and a piece of paper with his username and password. "What are all these things for?" he wondered. His mother smiled and said, "Let's set everything up together, and you'll understand."

当小明打开装着他新电脑的盒子时，他发现的不仅仅是电脑本身。在电脑旁边的是各种线缆、一个闪着灯的小矩形设备，以及一张写有他用户名和密码的纸。"这些都是干什么用的？"他疑惑地问。妈妈笑着说："让我们一起把它们安装好，你就会明白了。"

What Little Ming was about to discover is that his computer wasn't alone. It was part of a vast ecosystem of devices that had grown around our lives without most of us noticing. Let's count the digital devices in a typical modern home:

小明即将发现，他的电脑并不孤单。它是一个庞大设备生态系统的一部分，而这个生态系统已经在我们大多数人都没注意到的情况下在我们的生活中发展起来。让我们数一数一个典型现代家庭中有多少数字设备：

The Obvious Devices（显而易见的设备）

• **Smartphones（智能手机）**: Nearly everyone in the family has one. These small computers fit in your pocket but contain more processing power than the computers that sent astronauts to the moon.
• 口袋里的电脑，功能强大

• **Tablets（平板电脑）**: Larger screens for watching videos, playing games, and reading.
• 看视频、玩游戏、阅读的大屏幕设备

• **Laptop and Desktop Computers（笔记本电脑和台式电脑）**: For schoolwork, creative projects, and browsing the internet.
• 完成作业、创意项目和浏览互联网

• **Smart TVs（智能电视）**: TVs that can connect to the internet, stream movies, and even run apps.
• 可以连接互联网、播放电影甚至运行应用程序的电视

The Hidden Devices（隐藏的设备）

But here's where it gets interesting. Many devices around your home are also computers—devices you might not think of as "digital" at all:

但有趣的地方来了。你家里的许多设备也是电脑——一些你可能根本不会认为是"数字"设备的物品：

• **Smart Speakers（智能音箱）**: Those cylindrical devices that answer questions and play music? They contain microphones, processors, and network connections. They listen constantly, waiting for you to say "Hey!" or "Alexa" or "OK Google."
• 那些能回答问题、播放音乐的圆柱形设备？它们包含麦克风、处理器和网络连接。它们一直在监听，等待你说"嘿！"或"小爱同学"或"OK Google"。

• **Smart Home Hubs（智能家居中心）**: Devices that control your lights, thermostat, and security cameras.
• 控制灯光、恒温器和监控摄像头的设备

• **Gaming Consoles（游戏机）**: PlayStation, Xbox, Nintendo Switch—these are powerful computers specialized for running video games.
• 这些都是运行电子游戏的功能强大的电脑

• **Fitness Trackers and Smartwatches（健身追踪器和智能手表）**: Wristbands that count your steps, monitor your heart rate, and sometimes even make phone calls.
• 计算步数、监测心率、有时甚至能打电话的手环

• **Smart Refrigerators（智能冰箱）**: refrigerators with screens that can show recipes, create shopping lists, and even tell you when you're running low on milk.
• 带屏幕的冰箱，可以显示食谱、创建购物清单，甚至能告诉你什么时候牛奶快喝完了

• **Security Cameras（监控摄像头）**: Even some doorbell cameras are actually small computers with cameras and network connections.
• 甚至一些门铃摄像头也是带有摄像头和网络连接的小型电脑

• **Smart Toys（智能玩具）**: Robot dogs, talking dolls, educational tablets for kids—all contain processors and often network connections.
• 机器狗、会说话的玩具娃娃、儿童教育平板——都包含处理器，而且通常还有网络连接

Little Ming's family, like most modern families, had accumulated over 15 devices that could connect to the internet. "I had no idea we had so many computers in our house!" he exclaimed. His mother nodded. "And each one of them needs to be protected."

小明家，像大多数现代家庭一样，已经积累了超过15台可以连接互联网的设备。"我都不知道我们家有这么多电脑！"他惊叹道。妈妈点点头。"而它们每一台都需要被保护。"

But why? Why does a device need protection? The answer lies in what these devices actually do.

但是为什么呢？为什么设备需要保护？答案在于这些设备实际上在做什么。

The Nature of Digital Information

数字信息的本质

Every digital device—from the most powerful gaming computer to the smallest smart sensor—does essentially the same thing: it creates, stores, processes, and transmits information. Information is the life blood of the digital world.

每台数字设备——从最强大的游戏电脑到最小的智能传感器——基本上都在做同样的事情：创建、存储、处理和传输信息。信息是数字世界的生命线。

Think about what kind of information flows through your digital devices:

想想你的数字设备中流动着什么样的信息：

Personal Information（个人信息）

• Your name, address, and date of birth
• 你的姓名、地址和出生日期

• Your photos and videos
• 你的照片和视频

• Your messages to friends and family
• 你给朋友和家人的消息

• Your grades and school records
• 你的成绩和学校记录

Financial Information（财务信息）

• Your parents' bank account numbers
• 你父母的银行账号

• Credit card information for online shopping
• 在线购物用的信用卡信息

• Payment records for apps and games
• 应用程序和游戏的支付记录

Access Credentials（访问凭证）

• Usernames and passwords for websites
• 网站的用户名和密码

• Security questions and answers
• 安全问题及其答案

• Digital "keys" that prove you are who you claim to be
• 证明你身份的数字"钥匙"

Private Communications（私人通信）

• Emails between family members
• 家庭成员之间的电子邮件

• Video calls with grandparents
• 和祖父母视频通话

• Private messages shared only between close friends
• 只在好朋友之间分享的私人消息

This information is incredibly valuable. Not to you—well, of course it's valuable to you emotionally—but valuable to criminals who want to steal it, sell it, or hold it hostage. That's why protection matters.

这些信息非常有价值。不是对你来说——当然，情感上它们对你很有