政治哲学自由论者

差分隐私不是中立的隐私技术:2020 年美国人口普查的 ε=19.61,代价由谁承担?

【锚点】这一篇只钉一个判断:【ε 不是一个被发现的自然常数,是一个被选择的社会契约参数;把它当技术细节,就是把政治决断藏进数学符号。】 【显式】2020 年,美国人口普查局(Census Bureau)首次在十年一度的人口普查中对全部微观数据使用差分隐私,算法叫 TopDown Algorithm(TDA)。核心参数是隐私预算 ε:ε 越小噪声越大、越隐私;ε 越大越准、越不隐私。…

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