@Unpublished{RL96, author = { Ronald L. Rivest and Butler Lampson }, title = { SDSI -- A Simple Distributed Security Infrastructure }, urla = { CIS-SDSI-page }, date = { 1996-04-30 }, OPTmonth = { April 30, }, OPTyear = { 1996 }, abstract = { We propose a new distributed security infrastructure, called SDSI (pronounced ``Sudsy''). SDSI combines a simple public-key infrastructure design with a means of defining groups and issuing group-membership certificates. SDSI's groups provides simple, clear terminology for defining access-control lists and security policies. SDSI's design emphasizes linked local name spaces rather than a hierarchical global name space. } }