  Security questions are one of the techniques used to recover passwords. The
main limitation of security questions is that users find strong answers
difficult to remember. This leads users to trade-off security for the
convenience of an improved memorability. Previous research found that increased
fun and enjoyment can lead to an enhanced memorability, which provides a better
learning experience. Hence, we empirically investigate whether a serious game
has the potential of improving the memorability of strong answers to security
questions. For our serious game, we adapted the popular "4 Pics 1 word" mobile
game because of its use of pictures and cues, which psychology research found
to be important to help with memorability. Our findings indicate that the
proposed serious game could potentially improve the memorability of answers to
security questions. This potential improvement in memorability, could
eventually help reduce the trade-off between usability and security in
fall-back authentication.
