Cyrus SASL - authentication abstraction library This is the Cyrus SASL API implementation, version 2.1. SASL is the Simple Authentication and Security Layer, a method for adding authentication support to connection-based protocols. To use SASL, a protocol includes a command for identifying and authenticating a user to a server and for optionally negotiating protection of subsequent protocol interactions. If its use is negotiated, a security layer is inserted between the protocol and the connection. See RFC 2222 for more information. Any of: ANONYMOUS, CRAM-MD5, DIGEST-MD5, GSSAPI (MIT or Heimdal Kerberos 5), NTLM, OTP, PLAIN, or LOGIN can be used. If you intend to use this package on a server that provides SASL authentication, then you must install some of the libsasl2-modules* packages.