Indication of Conference Focus Support for the Centralized Conferencing Manipulation Protocol (CCMP). - Rifaat Shekh-Yusef; Mary Barnes (RFC, 2013)

HTTP Digest Access Authentication. - Rifaat Shekh-Yusef; David Ahrens; Sophie Bremer (RFC, 2015)

The Session Initiation Protocol (SIP) Digest Access Authentication Scheme. - Rifaat Shekh-Yusef (RFC, 2020)

Third-Party Token-Based Authentication and Authorization for Session Initiation Protocol (SIP). - Rifaat Shekh-Yusef; Christer Holmberg; Víctor Pascual (RFC, 2020)