Gonçalo, RuiPedrosa, TiagoLopes, Rui Pedro2023-03-032023-03-032020Gonçalo, Rui; Pedrosa, Tiago; Lopes, Rui Pedro (2020). An architecture for sharing cyberiIntelligence based on blockchain. In 2nd International Conference on Blockchain and Applications, BLOCKCHAIN 2020. L´Aquila. 1238, p.71-80ISBN: 978-3-030- 52534-7http://hdl.handle.net/10198/27449Cyber-intelligence sharing can leverage the development and deployment of security plans and teams within organizations, making infrastructures resilient and resistant to cyberattacks. To be efficient, information sharing should be performed in a trusted environment, ensuring both the integrity, privacy and confidentiality and the truthfulness and usefulness of the information. This paper addresses this issue with the development and deployment of an architecture based on blockchain technology. Each participant is granted a reputation level, that is used to assess and verify the information other actors produce. Each actor, then, is given an amount of credit, corresponding to the number and accuracy of the validation. Information is also organized in topics, instantiated in independent ledgers. The architecture was validated with a three organization scenario, for proof-of-concept.engBlockchainHyperledger fabricCybersecurityIntelligence sharingconference object10.1007/978-3-030-52535-4_8