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Sandi: A System for Accountability and Applications in Direct Communication. (arXiv:2401.16759v1 [cs.CR])
cs.CR updates on arXiv.org arxiv.org
We construct a system, Sandi, to bring trust in online communication between
parties that share little or no context. Sandi is based on a unique ``somewhat
monotone'' privacy-preserving reputation system, with strong privacy and
security properties. Registered senders request cryptographic tags from Sandi,
which they attach to their messages. Message receivers do not need registered
accounts, but they can use a sender's score to decide how much the sender
should be trusted. If a receiver finds the message inappropriate, they …
accountability applications arxiv communication context cryptographic privacy privacy and security reputation request security share system tags trust