Abstract
In contrast to public blockchains, private and permissioned blockchains enable specific organizations to come together and maintain a distributed and decentralized ledger to which only those specific participants have access. These private blockchains are favoured in scenarios where there is a particular emphasis on data privacy, such as in the exchange of electronic health records (EHRs) for example. However, managing internal data privacy within private blockchain platforms, i.e. which participants can see which data, is not a trivial task. Existing solutions such as private data collections, attribute based encryption and multi-party computation all have their limitations. In this paper, we propose an alternative approach based on asymmetric cryptography and we show how this can alleviate many of the current shortcomings.
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Acknowledgement
This work was supported by Enterprise Ireland and the Department of Enterprise, Trade and Employment through the Disruptive Technologies Innovation Fund (project number DT20180009).
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Ariappampalayam Krishnamoorthi, P., Shahid, S., Boydell, O. (2022). Preserving Privacy in Private Blockchain Networks. In: Lee, K., Zhang, LJ. (eds) Blockchain – ICBC 2021. ICBC 2021. Lecture Notes in Computer Science(), vol 12991. Springer, Cham. https://doi.org/10.1007/978-3-030-96527-3_8
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DOI: https://doi.org/10.1007/978-3-030-96527-3_8
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