The Pew Research Center has released "Americans and Digital Knowledge."
Here's an excerpt:
A new Pew Research Center survey finds that Americans' understanding of technology-related issues varies greatly depending on the topic, term or concept. While a majority of U.S. adults can correctly answer questions about phishing scams or website cookies, other items are more challenging. For example, just 28% of adults can identify an example of two-factor authentication – one of the most important ways experts say people can protect their personal information on sensitive accounts. Additionally, about one-quarter of Americans (24%) know that private browsing only hides browser history from other users of that computer, while roughly half (49%) say they are unsure what private browsing does.