摘要: We report the results of a large scale study password use andpassword re-use habits. The involved half million users over athree month period. A client component on users' machines recorded variety strength, usage and frequency metrics. This allows us to measure or estimate such quantities as average number passwords accounts each user has, how many she types per day, often are shared among sites, they forgotten. get extremely detailed data lengths chosen, vary by site. is first its kind, yields numerous other insights into role play in online experience.
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