Wink: Deniable Secure Messaging. (arXiv:2207.08891v1 [cs.CR])

End-to-end encrypted (E2EE) messaging is an essential first step towards
combating increasingly privacy-intrusive laws. Unfortunately, it is vulnerable
to compelled key disclosure -- law-mandated, coerced, or simply by device
compromise. This work introduces Wink, the first plausibly-deniable messaging
system protecting message confidentiality even when users are coerced to hand
over keys/passwords. Wink can surreptitiously inject hidden messages in the
standard random coins (e.g., salt, IVs) used by existing E2EE protocols. It
does so as part of legitimate secure cryptographic functionality …

messaging secure messaging