Comment by DanielDent

This paper references https://www.ndss-symposium.org/wp-content/uploads/2019/02/nd...

They in turn reference my 2015 take on this: http://dnscookie.com/

With homage Moxie's Cryptographic Doom Principle, I propose the Cache Doom Principle: If a system's behaviour can be influenced by a cache, eventually someone will figure out a way to use that cache to leak data.