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cs.DS2024
One Attack to Rule Them All: Tight Quadratic Bounds for Adaptive Queries on Cardinality Sketches
Edith Cohen, Jelani Nelson, Tamás Sarlós +2
Cardinality sketches are compact data structures for representing sets or vectors. These sketches are space-efficient, typically requiring only logarithmic storage in the input siz…
cs.CR2024
Lower Bounds for Differential Privacy Under Continual Observation and Online Threshold Queries
Edith Cohen, Xin Lyu, Jelani Nelson +2
One of the most basic problems for studying the "price of privacy over time" is the so called private counter problem, introduced by Dwork et al. (2010) and Chan et al. (2010). In…