Layman’s term and description for 2-Step Verification process

Many of us are probably used to seeing or hearing the term 'Two factor authentication' or '2 Step Verification' process by now, although we are probably more familiar with the interaction involved (i.e. enter email, and then enter in generated token in another device).

For people that are just beginning to use computers and mobile phones, I am wondering if there are examples of ways to describe this process in a way that doesn't sound technical and whether other terms have been used for this.

I have noticed that Google uses natural language to explain why this is needed and how to complete the process, but still uses the 'technical' term to describe the process.