Paper 2023/141

A Secure Bandwidth-Efficient Treatment for Dropout-Resistant Time-Series Data Aggregation

Reyhaneh Rabaninejad, Tampere University
Alexandros Bakas, Tampere University, Nokia-Bell Labs
Eugene Frimpong, Tampere University
Antonis Michalas, Tampere University, RISE Research Institutes of Sweden

Aggregate statistics derived from time-series data collected by individual users are extremely beneficial in diverse fields, such as e-health applications, IoT-based smart metering networks, and federated learning systems. Since user data are privacy-sensitive in many cases, the untrusted aggregator may only infer the aggregation without breaching individual privacy. To this aim, secure aggregation techniques have been extensively researched over the past years. However, most existing schemes suffer either from high communication overhead when users join and leave, or cannot tolerate node dropouts. In this paper, we propose a dropout-resistant bandwidth-efficient time-series data aggregation. The proposed scheme does not incur any interaction among users, involving a solo round of user→aggregator communication exclusively. Additionally, it does not trigger a re-generation of private keys when users join and leave. Moreover, the aggregator is able to output the aggregate value by employing the re-encrypt capability acquired during a one-time setup phase, notwithstanding the number of nodes in the ecosystem that partake in the data collection of a certain epoch. Dropout-resistancy, trust-less key management, low-bandwidth and non-interactive nature of our construction make it ideal for many rapid-changing distributed real-world networks. Other than bandwidth efficiency, our scheme has also demonstrated efficiency in terms of computation overhead

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Cryptographic protocols
Publication info
Published elsewhere. PerCom 2023
privacy-preserving aggregationtime-series datadropout-tolerantbandwidth-efficient
Contact author(s)
reyhaneh rabbaninejad @ tuni fi
alexandros bakas @ tuni fi
eugene frimpong @ tuni fi
antonios michalas @ tuni fi
2023-02-15: approved
2023-02-06: received
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      author = {Reyhaneh Rabaninejad and Alexandros Bakas and Eugene Frimpong and Antonis Michalas},
      title = {A Secure Bandwidth-Efficient Treatment for Dropout-Resistant Time-Series Data Aggregation},
      howpublished = {Cryptology ePrint Archive, Paper 2023/141},
      year = {2023},
      note = {\url{}},
      url = {}
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