Signal provides both deniability and authenticated encryption. This article has some good info on how this is possible: https://www.praetorian.com/blog/an-opin

Signal provides both deniability and authenticated encryption. This article has some good info on how this is possible: https://www.praetorian.com/blog/an-opinionated-series-on-why-signal-protocol-is-well-designed-deniability/ https://www.praetorian.com/blog/an-opinionated-series-on-why...