什么是零日漏洞？
What is a zero-day vulnerability?
零日漏洞指厂商尚未发现或尚未发布补丁的安全缺陷，攻击者抢在修复前利用其发起攻击，因此防御窗口极短。此类漏洞在地下市场常被高价交易。
A zero-day vulnerability is a flaw unknown to the vendor or unpatched at the time of attack; adversaries exploit it before a fix exists, leaving a very short defense window. Such bugs are often traded at high prices on underground markets.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据结论有争议 · Contested
来源 · Source
Russell & Norvig,《Artificial Intelligence: A Modern Approach》第4版,Pearson,2020
S. Russell and P. Norvig, Artificial Intelligence: A Modern Approach, 4th ed., Pearson, 2020
独立核验依据 · Independent verification: 核验依据 2 ARCHIVE 标识 isbn_9788177583670：Artificial Intelligence: A
#零日漏洞 #未修复 #攻击
什么是双因素认证？
What is two-factor authentication?
双因素认证在密码之外再增加一层验证，如手机验证码或指纹，要求你知道的加你拥有的或你本身的这两类凭证。即使密码泄露，攻击者也难以登录。
Two-factor authentication adds a second layer beyond a password—such as a phone code or fingerprint—requiring something you know plus something you have or are. Even if the password leaks, attackers can't easily log in.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-06
来源 · Source
美国国家标准与技术研究院（NIST）SP 800-63B
NIST SP 800-63B
独立核验依据 · Independent verification: 核验依据 1 NIST SP 800-63B · DOI 10.6028/NIST.SP.800-63b
#双因素认证 #多因子 #安全
什么是强密码？
What is a strong password?
强密码足够长且混合大小写字母、数字和符号，并避免使用生日、姓名等易猜信息。不同网站使用不同密码、配合密码管理器能显著降低被盗风险。
A strong password is long and mixes uppercase, lowercase, digits, and symbols, avoiding guessable info like birthdays or names. Using distinct passwords per site with a password manager greatly lowers theft risk.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-06
来源 · Source
美国国家标准与技术研究院（NIST）SP 800-63B
NIST SP 800-63B
独立核验依据 · Independent verification: 核验依据 1 NIST SP 800-63B · DOI 10.6028/NIST.SP.800-63b
#强密码 #密码安全 #凭据
为什么不能乱点陌生链接？
Why shouldn't we click strange links?
陌生链接可能藏着坏程序，一点就会偷偷装进手机或电脑、偷看你的信息。就像陌生人递来的糖果不一定安全，不确定的链接最好先问大人或别去点。
Strange links may hide bad programs that sneak onto your phone or computer and peek at your information once clicked. Like candy from a stranger, an unknown link isn't safe—when unsure, ask an adult or just don't click.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Russell & Norvig,《Artificial Intelligence: A Modern Approach》第4版,Pearson,2020
S. Russell and P. Norvig, Artificial Intelligence: A Modern Approach, 4th ed., Pearson, 2020
独立核验依据 · Independent verification: 核验依据 2 ARCHIVE 标识 isbn_9788177583670：Artificial Intelligence: A
#链接 #安全 #防范