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Secure and Robust Cyber Security Threat Information Sharing

Abstract : In recent years, several laws have been decreed, at both national and European levels, to mandate private and public organizations to share their Cyber Security related information. However, exist- ing threat sharing platforms implement ”classical” access control mechanisms or at most centralized attribute-based encryption (ABE) to prevent data leakage and preserve data confidentiality. These schemes are well-known to be suffering from a single point of failure on security aspects. That is, if the central authority is compromised, the confidentiality of the shared sensitive information is no longer ensured. To address this challenge, we propose a new ABE scheme combining both the advantages of centralized and decentralized ABE while overcoming their weaknesses. It overcomes the centralized ABE’s single point of failure on security by requiring the collaboration of several entities for decryption key issuing. In addition, in contrast to existing decentralized ABE schemes, our con- struction does not require the data providers to fully trust all attributes authorities, only a single authority should be trusted. Finally, we formally prove the security of our ABE construction in the generic group model.
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Contributor : Patrice Aknin Connect in order to contact the contributor
Submitted on : Tuesday, February 1, 2022 - 9:00:08 AM
Last modification on : Tuesday, October 18, 2022 - 8:34:05 AM


  • HAL Id : hal-03550377, version 1



Anis Bkakria, Reda Yaich, Walid Arabi. Secure and Robust Cyber Security Threat Information Sharing. International Symposium on Foundations & Practice of Security, Dec 2021, Paris, France. ⟨hal-03550377⟩



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