"...allows you to have private conversations over instant messaging by providing: Encryption [...] Authentication [...] Deniability [...] Perfect forward secrecy ..."
A. Dargahi Nobari, N. Reshadatmand, and M. Neshati. Proceedings of the 2017 ACM on Conference on Information and Knowledge Management, page 2035–2038. New York, NY, USA, Association for Computing Machinery, (2017)
S. Fahl, M. Harbach, T. Muders, and M. Smith. Proceedings of the 23rd ACM conference on Hypertext and social media, page 145--154. New York, NY, USA, ACM, (2012)