Openrsync: An implementation of rsync, by the OpenBSD team
Summary
Openrsync is a BSD-licensed implementation of rsync authored by the OpenBSD team. It aims for compatibility with modern rsync while integrating OpenBSD-style security features and portability across UNIX-like systems. The article explains the architecture, block-exchange algorithm, and hashing process, and highlights security mechanisms (pledge and unveil) and portability considerations.