Counter-point to this: Fuck RSA @ Summercon 2019
RSA is elegant and simple, which makes it tempting to implement. But as that talk explains, there’s a huge number of traps that you can fall into. The article does nothing to warn about these risks.
RSA was great back when it was new. It’s now more than 40 years old. We have way better options now and RSA needs to retire.