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dc.contributor.authorJajodia, Sushil*
dc.contributor.authorLitwin, Witold*
dc.contributor.authorSchwarz, Thomas*
dc.date.accessioned2013-10-15T14:19:50Z
dc.date.available2013-10-15T14:19:50Z
dc.date.issued2012
dc.identifier.urihttps://basepub.dauphine.fr/handle/123456789/11835
dc.language.isoenen
dc.subjectClouden
dc.subjectDispersionen
dc.subjectPassword escrowen
dc.subjectPassword recoveryen
dc.subject.ddc005.7en
dc.titleSecuring password recovery through dispersionen
dc.typeCommunication / Conférence
dc.description.abstractenPasswords form the Achilles heel of most uses of modern cryptography. Key recovery is necessary to provide continuous access to documents and other electronic assets in spite of possible loss of a password. Key escrow services provide key recovery for the owner, but need to be trusted. Additionally, a user might want to divulge passwords in case of his/her death or incapacitation, but not before. We present here a scheme that uses dispersion to provide trusted escrow services. Our scheme uses secret sharing to disperse password recovery information over several escrow services that authenticate based on a weak password. To protect against dictionary attacks, each authentication attempt takes a noticeable, but tolerable time (e.g. minutes). We achieve this by having the share of the secret be the solution of a puzzle that is solved by brute force in time depending on the number of processors employed. This additionally prevents escrow agencies from optimizing their part in recovering a password by pre-computing and storing their share in a more accessible and hence vulnerable format.en
dc.identifier.citationpages228-233en
dc.relation.ispartoftitle2012 Fourth International Conference on Computational Aspects of Social Networks (CASoN), proceedingsen
dc.relation.ispartofpublnameIEEEen
dc.relation.ispartofdate2012
dc.subject.ddclabelOrganisation des donnéesen
dc.relation.ispartofisbn978-1-4673-4793-8en
dc.relation.conftitle2012 Fourth International Conference on Computational Aspects of Social Networks (CASoN)en
dc.relation.confdate2012-11
dc.relation.confcitySao Carlosen
dc.relation.confcountryBrazilen
dc.relation.forthcomingnonen
dc.identifier.doi10.1109/CASoN.2012.6412407en
dc.description.halcandidateoui
dc.description.readershiprecherche
dc.description.audienceInternational
dc.relation.Isversionofjnlpeerreviewedoui
hal.person.labIds*
hal.person.labIds989*
hal.person.labIds*
hal.identifierhal-01495366*


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