{"id":159852,"date":"2010-08-10T00:00:00","date_gmt":"2010-08-10T00:00:00","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/msr-research-item\/popularity-is-everything-a-new-approach-to-protecting-passwords-from-statistical-guessing-attacks\/"},"modified":"2018-10-16T19:59:34","modified_gmt":"2018-10-17T02:59:34","slug":"popularity-is-everything-a-new-approach-to-protecting-passwords-from-statistical-guessing-attacks","status":"publish","type":"msr-research-item","link":"https:\/\/www.microsoft.com\/en-us\/research\/publication\/popularity-is-everything-a-new-approach-to-protecting-passwords-from-statistical-guessing-attacks\/","title":{"rendered":"Popularity is Everything: A new approach to protecting passwords from statistical-guessing attacks"},"content":{"rendered":"<div class=\"asset-content\">\n<p>We propose to strengthen user-selected passwords against statistical-guessing attacks by allowing users of Internet-scale systems to choose any password they want-so long as it&#8217;s not already too popular with other users. We create an oracle to identify undesirably popular passwords using an existing data structure known as a count-min sketch, which we populate with existing users&#8217; passwords and update with each new user password. Unlike most applications of probabilistic data structures, which seek to achieve only a maximum acceptable rate false-positives, we set a minimum acceptable false-positive rate to confound attackers who might query the oracle or even obtain a copy of it.<\/p>\n<\/div>\n<p><!-- .asset-content --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>We propose to strengthen user-selected passwords against statistical-guessing attacks by allowing users of Internet-scale systems to choose any password they want-so long as it&#8217;s not already too popular with other users. We create an oracle to identify undesirably popular passwords using an existing data structure known as a count-min sketch, which we populate with existing [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":null,"msr_publishername":"USENIX","msr_publisher_other":"","msr_booktitle":"","msr_chapter":"","msr_edition":"The 5th USENIX Workshop on Hot Topics in Security (HotSec '10)","msr_editors":"","msr_how_published":"","msr_isbn":"","msr_issue":"","msr_journal":"","msr_number":"","msr_organization":"","msr_pages_string":"","msr_page_range_start":"","msr_page_range_end":"","msr_series":"","msr_volume":"","msr_copyright":"","msr_conference_name":"The 5th USENIX Workshop on Hot Topics in Security (HotSec 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