Research Output

Privacy-Preserving Passive DNS

  The Domain Name System (DNS) was created to resolve the IP addresses of web servers to easily remembered names. When it was initially created, security was not a major concern; nowadays, this lack of inherent security and trust has exposed the global DNS infrastructure to malicious actors. The passive DNS data collection process creates a database containing various DNS data elements, some of which are personal and need to be protected to preserve the privacy of the end users. To this end, we propose the use of distributed ledger technology. We use Hyperledger Fabric to create a permissioned blockchain, which only authorized entities can access. The proposed solution supports queries for storing and retrieving data from the blockchain ledger, allowing the use of the passive DNS database for further analysis, e.g., for the identification of malicious domain names. Additionally, it effectively protects the DNS personal data from unauthorized entities, including the administrators that can act as potential malicious insiders, and allows only the data owners to perform queries over these data. We evaluated our proposed solution by creating a proof-of-concept experimental setup that passively collects DNS data from a network and then uses the distributed ledger technology to store the data in an immutable ledger, thus providing a full historical overview of all the records.

  • Type:

    Article

  • Date:

    12 August 2020

  • Publication Status:

    Published

  • DOI:

    10.3390/computers9030064

  • Cross Ref:

    computers9030064

  • Funders:

    Edinburgh Napier Funded

Citation

Papadopoulos, P., Pitropakis, N., Buchanan, W. J., Lo, O., & Katsikas, S. (2020). Privacy-Preserving Passive DNS. Computers, 9(3), https://doi.org/10.3390/computers9030064

Authors

Keywords

passive DNS (Domain Name System); privacy-preserving; distributed ledger; blockchain; hyperledger fabric; private data collection

Monthly Views:

Available Documents

  • pdf

    Privacy-Preserving Passive DNS

    1MB

    This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

  • Downloadable citations

    HTML BIB RTF