is mass surveillance effective（関連順）

15:40

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The NSA and surveillance ... made simple - animation

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State of scrutiny: Is mass surveillance justified?

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Ban Mass Surveillance

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Our Responsibility to Defeat Mass Surveillance • Erik Doernenburg & Martin Fowler • GOTO 2014

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Tech Tool Enables Mass Surveillance Capabilities For Police

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Causes - The fight against mass surveillance

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1:44

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0:59

NSA Whistleblower Thomas Drake Explains How Mass Surveillance Violates The Constitution

AJ+

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1:33

Obama defends internet surveillance programs

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1:37

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結果 : is mass surveillance effective