You're mis-representing my examples by shifting the context, and quoting a wikipedia page that literally gives the same examples to two of the main ones I mentioned at the very top of the article as key examples of security through obscurity: "Examples of this practice include disguising sensitive information within commonplace items, like a piece of paper in a book, or altering digital footprints, such as spoofing a web browser's version number"
If you're not understanding how memory allocation randomization is security through obscurity- you are not understanding what the concept entails at the core. It does share a common method with, e.g. using a closed 3rd party firewall: in both cases direct flaws exist that could be overcome with methods other than brute force, yet identifying and specifying them enough to actually exploit is non-trivial.
The flaw in your firewall example is not using obscurity itself, but: (1) not also using traditional methods of hardening on top of it - obscurity should be an extra layer not an only layer, and (2) it's probably not really very obscure, e.g. if an external person could infer what software you are using by interacting remotely, and then obtain their own commercial copy to investigate for flaws.
If you're not understanding how memory allocation randomization is security through obscurity- you are not understanding what the concept entails at the core. It does share a common method with, e.g. using a closed 3rd party firewall: in both cases direct flaws exist that could be overcome with methods other than brute force, yet identifying and specifying them enough to actually exploit is non-trivial.
The flaw in your firewall example is not using obscurity itself, but: (1) not also using traditional methods of hardening on top of it - obscurity should be an extra layer not an only layer, and (2) it's probably not really very obscure, e.g. if an external person could infer what software you are using by interacting remotely, and then obtain their own commercial copy to investigate for flaws.