Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spaced Repetition and Mnemonics Enable Recall of Multiple Strong
  Passwords   We report on a user study that provides evidence that spaced repetition and a
specific mnemonic technique enable users to successfully recall multiple strong
passwords over time. Remote research participants were asked to memorize 4
Person-Action-Object (PAO) stories where they chose a famous person from a
drop-down list and were given machine-generated random action-object pairs.
Users were also shown a photo of a scene and asked to imagine the PAO story
taking place in the scene (e.g., Bill Gates---swallowing---bike on a beach).
Subsequently, they were asked to recall the action-object pairs when prompted
with the associated scene-person pairs following a spaced repetition schedule
over a period of 127+ days. While we evaluated several spaced repetition
schedules, the best results were obtained when users initially returned after
12 hours and then in $1.5\times$ increasing intervals: 77% of the participants
successfully recalled all 4 stories in 10 tests over a period of 158 days. Much
of the forgetting happened in the first test period (12 hours): 89% of
participants who remembered their stories during the first test period
successfully remembered them in every subsequent round. These findings, coupled
with recent results on naturally rehearsing password schemes, suggest that 4
PAO stories could be used to create usable and strong passwords for 14
sensitive accounts following this spaced repetition schedule, possibly with a
few extra upfront rehearsals. In addition, we find that there is an
interference effect across multiple PAO stories: the recall rate of 100% (resp.
90%) for participants who were asked to memorize 1 PAO story (resp. 2 PAO
stories) is significantly better than the recall rate for participants who were
asked to memorize 4 PAO stories. These findings yield concrete advice for
improving constructions of password management schemes and future user studies.

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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: plasm-ph