Post AcSidFeYdOxTXyACyu by rene_mobile@infosec.exchange
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 (DIR) Post #AcSidFeYdOxTXyACyu by rene_mobile@infosec.exchange
       2023-12-04T01:59:13Z
       
       0 likes, 1 repeats
       
       Later today, I am finally going to live-present a conference paper again: "Anonymously Publishing Liveness Signals with Plausible Deniability", mostly by Michael Sonntag and in cooperation with Stefan Rass and me. The topic is a cryptographic protocol for verifying that whistleblowers and other secrets holders are still alive and well, that is, generating and verifying binary signals (without further information content) sent (semi-) regularly. The most interesting aspects follow from the goal of plausible deniability: as a prover (whisteblower) or verifier, being able to plausibly claim to hold the respective other role or being part of an interaction that has already become inactive before, because stored data does not allow deciding either way when provided with the wrong decryption passphrase. Tools we use are Tor onion services and hash chains (totally not a Blockchain), prototyped as a Java library and Android app.Details at https://link.springer.com/chapter/10.1007/978-3-031-48348-6_1, preprint soon so be available at https://www.digidow.eu/publications/.