We need more papers like this. Very nice. I wonder though if this work would be recognized for academic progress in research institutions? Specifically, is it publishable in some top-tier journal? (If so, which one?)
So journal publication is not the only means of recognition.
Speaking of which, computer science is a bit weird in that conference papers tend to have higher visibility than journals, even though the latter still has some of its grandfathered glory. Not all conferences are equal, obviously. Some have a more rigorous submission process than others. But our field definitely carries a bit of skepticism about the value added by journal publishers.
If your paper is good, on eprint and you spread the word a bit, then it will get citations - often more than if you publish in a 2nd tier conference - and when it's popular enough then eventually one of the main conferences (journals are less popular in crypto) will accept it in some form. This happened among other things to several of Dan Bernstein's papers (the guy who invented curve25519 among other things).
[1]: https://github.com/mimoo/RSA-and-LLL-attacks/blob/master/sur...
On the other hands there are a number of such "tutorials" being published on eprint, so I think if it's sort of random on a pre-print, then it must be pretty hard to publish this sort of papers in serious journals.