The Chang-Maxemchuk algorithm (US Patent 4,725,834 ) solves atomic broadcast (and in-order broadcast) problems for distributed networks in a far simpler and more efficient way than some popular alternatives. In fact, the obscurity of this method is hard to understand given the
Reliable broadcast algorithms: after 20 years
New paper with short description of the Chang/Maxmchuk algorithm I have been championing for 20 years or more.