No. I think people may have taken it as a working example of encryption. Evidently it's not.
The post in question is also specifically replying to someone asking how Bob and Alice can tell a secret, without Eve knowing. The given example does not do that.
> Are you an idiot or do you think everyone else is? This is one of the worst posts I've ever...
Have you read: https://news.ycombinator.com/newsguidelines.html yet?
Not yet, I've removed the offensive parts. But if you quote from me please quote correctly, your current comment(and the fact that you update it in every 5 minutes) is misleading.
The whole point of simplifying something to an intro level is taking out a bunch of detail so that the most important core premise becomes visible. Adding back the removed detail doesn't change the basic point of the simple explanation it refines it.
The OP appears to have fundamentally missed the point.