Encryption 101: What is it? When should I use it?

For a security wonk, frequently getting into conversations with people about security topics is an occupational hazard. And while those conversations usually happen with more gusto and at greater length than are entirely desired by either party, they can often offer a sobering glimpse into people’s real security practices and thought processes.

One thing I have learned is that, more than perhaps any other security topic, encryption really seems to perplex a lot of people. So, let us have a look at what it is, and why it is useful.

Encryption 101: What is it? When should I use it?