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Ming Ding | Information Security and

Privacy Group | Data61, CSIROA fundamental trade -off between privacy and

utility

•Noise ↑, privacy ↑ (e.g., in differential privacy, ε↓)

•Noise ↑, data utility ↓

εUtility

Better utility

Weaker privacyA trade -off point achieving a reasonably good

utility performance with a sufficiently small ε