Welcome to the resource topic for 2018/1232
Title:
Certificate Transparency Using Blockchain
Authors: D S V Madala, Mahabir Prasad Jhanwar, Anupam Chattopadhyay
Abstract:The security of web communication via the SSL/TLS protocols relies on safe distributions of public keys associated with web domains in the form of \mathsf{X.509} certificates. Certificate authorities (CAs) are trusted third parties that issue these certificates. However, the CA ecosystem is fragile and prone to compromises. Starting with Google’s Certificate Transparency project, a number of research works have recently looked at adding transparency for better CA accountability, effectively through public logs of all certificates issued by certification authorities, to augment the current \mathsf{X.509} certificate validation process into SSL/TLS. In this paper, leveraging recent progress in blockchain technology, we propose a novel system, called \mathsf{CTB} , that makes it impossible for a CA to issue a certificate for a domain without obtaining consent from the domain owner. We further make progress to equip \mathsf{CTB} with certificate revocation mechanism. We implement \mathsf{CTB} using IBM’s Hyperledger Fabric blockchain platform. \mathsf{CTB}'s smart contract, written in Go, is provided for complete reference.
ePrint: https://eprint.iacr.org/2018/1232
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