[PDF] apple differential privacy epsilon

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  • What is the Epsilon value in differential privacy?

    Epsilon is the quantitative privacy guarantee.
    It puts a ceiling on how much the probability of a particular output can increase if you were to add or remove a single training example. Stringent privacy needs usually require an epsilon value of less than one.

  • Does Apple use differential privacy?

    It is a technique that enables Apple to learn about the user community without learning about individuals in the community.
    Differential privacy transforms the information shared with Apple before it ever leaves the user's device such that Apple can never reproduce the true data.

  • What is the effect of setting an epsilon parameter in a differential privacy solution?

    Epsilon is an important parameter that affects differential privacy protection, also known as the Privacy Budget.
    The lower the value of epsilon, the higher the level of privacy protection, which lowers the utility of the data.

  • What is the effect of setting an epsilon parameter in a differential privacy solution?

    End-to-end encryption
    iMessage and FaceTime are designed so that there's no way for Apple to read your messages when they're in transit between devices.
    You can choose to automatically delete your messages from your device after 30 days or a year or keep them on your device indefinitely.

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