In the first part, Schneier establishes a context for the topic of digital security by discussing threats, types of attacks, adversaries (i.e., "bad guys"), and the needs for true security.
在第一部分中，Schneier通过讨论所面对的威胁、攻击的类型、对手(比如，恶意破坏者)和安全的需要，为数字安全这个主题建立了一个上下文。
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