What is deniability? Although it might sound trivial, this question have sparked a series of debates on the privacy/security community ranging from a legal to a technical perspective. In the context of secure communications and channels, this question is notoriously difficult to approach and analyze. To answer it, one needs to look at the broader picture in which deniability applies. In this talk, we will look at how a notion of deniability can be attained by making more explicit the definitions given in the work of Canetti et al., Unger, and Walfish.
Given these prior notions, does deniability can be applied in context of secure communication and channels? In this talk, we will try to clarify what deniability means in terms of communication, and specify how it can implemented (and what it needs) in the real world.
Sofía Celi is a cryptography researcher and implementer at Cloudflare. She spends her time implementing in C and Go, and thinking about OTR, post-quantum algorithms, anonymous credentials and TLS.