12109007

Source:http://linkedlifedata.com/resource/pubmed/id/12109007

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Predicate	Object
rdf:type	pubmed:Citation
lifeskim:mentions	umls-concept:C0085097, umls-concept:C0443288, umls-concept:C1272745, umls-concept:C1706077, umls-concept:C1709475
pubmed:issue	2
pubmed:dateCreated	2002-7-11
pubmed:abstractText	Entering a username-password combination is a widely used procedure for identification and authentication in computer systems. However, it is a notoriously weak method, in that the passwords adopted by many users are easy to crack. In an attempt to improve security, proactive password checking may be used, in which passwords must meet several criteria to be more resistant to cracking. In two experiments, we examined the influence of proactive password restrictions on the time that it took to generate an acceptable password and to use it subsequently to long in. The required length was a minimum of five characters in Experiment 1 and eight characters in Experiment 2. In both experiments, one condition had only the length restriction, and the other had additional restrictions. The additional restrictions greatly increased the time it took to generate the password but had only a small effect on the time it took to use it subsequently to long in. For the five-character passwords, 75% were cracked when no other restrictions were imposed, and this was reduced to 33% with the additional restrictions. For the eight-character passwords, 17% were cracked with no other restrictions, and 12.5% with restrictions. The results indicate that increasing the minimum character length reduces crackability and increases security, regardless of whether additional restrictions are imposed.
pubmed:language	eng
pubmed:journal	http://linkedlifedata.com/resource/pubmed/journal/8413015
pubmed:citationSubset	IM
pubmed:status	MEDLINE
pubmed:month	May
pubmed:issn	0743-3808
pubmed:author	pubmed-author:LienMei-ChingMC, pubmed-author:ProctorRobert WRW, pubmed-author:SalvendyGavrielG, pubmed-author:SchultzE EugeneEE, pubmed-author:VuKim-Phuong LKP
pubmed:issnType	Print
pubmed:volume	34
pubmed:owner	NLM
pubmed:authorsComplete	Y
pubmed:pagination	163-9
pubmed:dateRevised	2006-11-15
pubmed:meshHeading	pubmed-meshheading:12109007-Computer Security, pubmed-meshheading:12109007-Humans, pubmed-meshheading:12109007-Memory, pubmed-meshheading:12109007-Questionnaires
pubmed:year	2002
pubmed:articleTitle	Improving computer security for authentication of users: influence of proactive password restrictions.
pubmed:affiliation	Department of Psychological Sciences, Purdue University, West Lafayette, IN 47907-1364, USA. proctor@psych.purdue.edu
pubmed:publicationType	Journal Article, Clinical Trial, Research Support, Non-U.S. Gov't