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InfoResearchPeer-reviewed
P3H-I and P3H-II: Dual-Mode Privacy-Preserving Hierarchical Heavy Hitters Detection With Matrix Storage and Tree Optimization
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Summary
The paper presents P3H-I, a privacy-preserving scheme for hierarchical heavy hitters detection that protects subordinate relationships across hierarchy levels using matrix-based encoding and secure three-party computation. It also presents P3H-II, a privacy-efficiency trade-off variant that uses prefix tree traversal, pruning, and pre-computation to reduce communication and computational overhead. The authors report robust privacy with low costs, outperforming existing methods.