Chinese moviegoers wear 3-D glasses as they watch Avatar in January 2010. AFP/Getty Images hide caption

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Security expert Markus Jakobsson says the best password could be as simple as combining words from a story that only you know. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Hiroaki Aikawa and his son, Taiji, mourn the death of Hiroaki's wife, in Kevin Macdonald's Life in a Day, produced by Scott Free UK. Scott Free UK hide caption

itoggle caption Scott Free UK

GOP presidential hopefuls use 140 characters or less to answer the question: "As president, how will you avoid continually raising the debt ceiling?" Amy Ta/NPR hide caption

itoggle caption Amy Ta/NPR