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Measurement and Analysis of Private Key Sharing in the HTTPS Ecosystem
External Dataset
External Data Source
InferLink Corporation
55 (lowest rank is 55)

Category & Restrictions

application layer security, network data


This paper performs a large-scale measurement study of key sharing in today's web, and references several relevant datasets.

The semantics of online authentication in the web are rather straightforward: if Alice has a certificate binding Bob's name to a public key, and if a remote entity can prove knowledge of Bob's private key, then (barring key compromise) that remote entity must be Bob. However, in reality, many websites-and the majority of the most popular ones-are hosted at least in part by third parties such as Content Delivery Networks (CDNs) or web hosting providers. Put simply: administrators of websites who deal with (extremely) sensitive user data are giving their private keys to third parties. Importantly, this sharing of keys is undetectable by most users, and widely unknown even among researchers. In this paper, we perform a large-scale measurement study of key sharing in today's web. We analyze the prevalence with which websites trust third-party hosting providers with their secret keys, as well as the impact that this trust has on responsible key management practices, such as revocation. Our results reveal that key sharing is extremely common, with a small handful of hosting providers having keys from the majority of the most popular websites. We also find that hosting providers often manage their customers' keys, and that they tend to react more slowly yet more thoroughly to compromised or potentially compromised keys. ;

Additional Details

trust, linguistics, interactive media, video on demand services, cryptographic protocol, communication protocol, world wide web, application layer protocols, video hosting, semantics, key management, transport layer security, internet hosting, external data source, streaming media systems, streaming, public key cryptography, internet hosting service, measurement and analysis of private key sharing in the https ecosystem, applications of cryptography, content delivery network, internet protocol, cryptosystem, authentication, file sharing, online services, uniform resource identifier, website, hypertext transfer protocol, data security, public key certificate, inferlink corporation, e commerce, distributed data storage, 1150, secure communication, online content distribution, history of computing, digital media, web hosting, cloud storage, internet broadcasting