olemus
mehhanism, mis vahendab kõiki subjektide pöördumisi objektide poole
= the mechanism that mediates all the accesses of subjects to objects

näiteid
operatsioonisüsteemi kaitstud ja möödumatu moodul, mis reguleerib kõiki tarkvara pöördumisi andmeobjektide ja seadmete poole

NIST SP 800-53 Rev. 5:
a set of design requirements on a reference validation mechanism that, as a key component of an operating system, enforces an access control policy over all subjects and objects
A reference validation mechanism is always invoked (i.e., complete mediation), tamperproof, and small enough to be subject to analysis and tests, the completeness of which can be assured (i.e., verifiable).
https://cfvod.kaltura.com/p/1926081/sp/192608100/thumbnail/entry_id/0_a1a3e40t/version/100000/width/560/height/400

ülevaateid
https://en.wikipedia.org/wiki/Reference_monitor

http://www.it.uu.se/edu/course/homepage/sakdat/ht06/overview/monitors

http://www.cse.psu.edu/~trj1/cse543-f13/slides/cse543-reference-monitor.pdf

https://www.cs.utexas.edu/~shmat/courses/cs380s_fall09/07refmonitors.ppt

https://www.cs.columbia.edu/~suman/secure_sw_devel/ref_monitor.pdf