请简述什么是-counterintelligence-，并要求以Markdown形式输出。-counterintelligence-是指用来保护国家或组织免遭对手情报活动侵害的一系列活动。它涉及识别、遏制、利用、扰乱对手情报组织结构和人员，并保护或阻止敏感信息泄露。要求文字要求语言简洁明了，60-80字。
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### Counterintelligence
Counterintelligence refers to activities designed to protect a nation or organization from adversary intelligence operations. It involves identifying, countering, and disrupting enemy intelligence structures and personnel, and safeguarding against sensitive information leaks.
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