Brewer Nash Model (aka Chinese Wall): CISSP Domain – Security Engineering
This describes a control where particularly vendors or consultants who have a conflict of interest because perhaps they also work for a competitor are prevented from accessing any areas, tools or environments that may be in conflict with their other work allegiances.
For the CISSP, I was able to remember this one because to me Brewer Nash sounds super British and with the colonial history between the UK and China I think of the Great Wall of China. Hey, we all have different techniques for remembering things, so sue me. 🙂