Security Attribute Modulation Protocol (SAMP) is a protocol used to encode role-based and user-based access control attributes for transmission over a network, typically embedded in a TCP/IP or UDP/IP packet, with an application layer payload trailing afterwards.

Sun Microsystems makes a brief mention of SAMP in their Trusted Solaris 8 administration manuals. In the case of Trusted Solaris 8, the Trusted Network Daemon parses SAMP headers and manages system security in conjunction with other security provisions on the system.