Researchers at Indian Institute of Technology-Kharagpur, in collaboration with other universities, are investigating whether recalling text messages, calls, and Facebook likes could be a useful log-in strategy.The researchers think that kind of question could eventually work as a simpler log-in method for some websites and services.

In a research project dubbed ActivPass, researchers from the Indian Institute of Technology Kharagpur, the University of Texas at Austin, and the University of Illinois Urbana-Champaign studied how well participants could answer questions based on a log of activity, including Facebook posts, websites visited, songs downloaded, and people called and texted.

On average, users succeeded in answering three questions about themselves correctly 95 percent of the time, and they were able to answer questions about other people less than six percent of the time.Choudhury said the researchers were speaking with companies like Yahoo and Intel to figure out if what they're doing could be useful for enterprise users.The study was published in MIT Technology Review.