What is a RSA token?
In the realm of cryptographic security and financial transactions, I've come across the term 'RSA token' quite frequently. Could you please elaborate on what it precisely entails? I understand it has something to do with authentication and encryption, but I'm curious about its specific function and applications. Is it a hardware device, a software component, or both? What sort of systems and processes commonly integrate RSA tokens? Also, are they primarily used in finance or have they found broader usage across other industries?