Simple Authentication and Security Layer
The Simple Authentication and Security Layer (SASL) is a framework for providing authentication and data security services in connection-oriented protocols via replaceable mechanisms. SASL provides a structured interface between protocols and mechanisms. SASL also provides a protocol for securing subsequent protocol exchanges within a data security layer. (Melnikov and Zeilenga 2006, 1)
References:
Melnikov, Alexey, and K Zeilenga. 2006. “Rfc 4422: Simple Authentication and Security Layer (Sasl).” RFC Editor. https://www.ietf.org/rfc/rfc4422.html.