29.​10.​2018 - Paul Rös­ler

At IACR In­ter­na­tio­nal Cryp­to­lo­gy Con­fe­rence, CRYP­TO 2018 in Santa Bar­ba­ra Paul Rös­ler pre­sen­ted the paper "Towards Bi­di­rec­tio­nal Rat­che­ted Key Ex­chan­ge". In this work Ber­tram Poet­te­ring and Paul Rös­ler de­fined and con­struc­ted one of the core pri­mi­ti­ves of in­stant mes­sa­ging: the key up­date me­cha­nism named "rat­che­ting". In con­trast to "rat­che­ting" pro­to­cols de­ploy­ed in major mes­sen­ger like Si­gnal, the pro­to­cols de­si­gned in the pre­sen­ted paper prov­a­b­ly reach se­cu­ri­ty in a com­pre­hen­si­bly strong at­ta­cker model. For full de­tails see the ex­ten­ded ver­si­on of the paper: https://​eprint.​iacr.​org/​2018/​296.​pdf