It means nothing. The whole quote is pure nonsensical technobabble; headmelted is joking by sarcastically bringing it up as a valid concern.

It's funny because that's an actual quote from Maria Johnsen's article ["Should multilingual websites use HTTPS by default"][1], and the fact that she actually wrote that in a supposedly serious article discussing the merits of HTTPS makes it pretty clear she has no idea what she's talking about when it comes to security. (Especially compared to "this Troy Hunt guy", who is a well-known expert in the information security industry.)

[1]: https://web.archive.org/web/20160621124800/https://www.maria...

I think he's joking