{"id":"https://openalex.org/W2904317862","doi":"https://doi.org/10.1007/978-981-13-1483-4_4","title":"CAPTCHA Design and Security Issues","display_name":"CAPTCHA Design and Security Issues","publication_year":2018,"publication_date":"2018-12-06","ids":{"openalex":"https://openalex.org/W2904317862","doi":"https://doi.org/10.1007/978-981-13-1483-4_4","mag":"2904317862"},"language":"en","primary_location":{"id":"doi:10.1007/978-981-13-1483-4_4","is_oa":false,"landing_page_url":"https://doi.org/10.1007/978-981-13-1483-4_4","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Advances in Cyber Security: Principles, Techniques, and Applications","raw_type":"book-chapter"},"type":"book-chapter","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5068576783","display_name":"Yang-Wai Chow","orcid":"https://orcid.org/0000-0003-3348-7014"},"institutions":[{"id":"https://openalex.org/I204824540","display_name":"University of Wollongong","ror":"https://ror.org/00jtmb277","country_code":"AU","type":"education","lineage":["https://openalex.org/I204824540"]}],"countries":["AU"],"is_corresponding":true,"raw_author_name":"Yang-Wai Chow","raw_affiliation_strings":["Institute of Cybersecurity and Cryptology, School of Computing and Information Technology University of Wollongong, Wollongong, Australia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Cybersecurity and Cryptology, School of Computing and Information Technology University of Wollongong, Wollongong, Australia","institution_ids":["https://openalex.org/I204824540"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5054741725","display_name":"Willy Susilo","orcid":"https://orcid.org/0000-0002-1562-5105"},"institutions":[{"id":"https://openalex.org/I204824540","display_name":"University of Wollongong","ror":"https://ror.org/00jtmb277","country_code":"AU","type":"education","lineage":["https://openalex.org/I204824540"]}],"countries":["AU"],"is_corresponding":false,"raw_author_name":"Willy Susilo","raw_affiliation_strings":["Institute of Cybersecurity and Cryptology, School of Computing and Information Technology University of Wollongong, Wollongong, Australia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Cybersecurity and Cryptology, School of Computing and Information Technology University of Wollongong, Wollongong, Australia","institution_ids":["https://openalex.org/I204824540"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5023301724","display_name":"Pairat Thorncharoensri","orcid":"https://orcid.org/0000-0002-1465-2718"},"institutions":[{"id":"https://openalex.org/I204824540","display_name":"University of Wollongong","ror":"https://ror.org/00jtmb277","country_code":"AU","type":"education","lineage":["https://openalex.org/I204824540"]}],"countries":["AU"],"is_corresponding":false,"raw_author_name":"Pairat Thorncharoensri","raw_affiliation_strings":["Institute of Cybersecurity and Cryptology, School of Computing and Information Technology University of Wollongong, Wollongong, Australia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Cybersecurity and Cryptology, School of Computing and Information Technology University of Wollongong, Wollongong, Australia","institution_ids":["https://openalex.org/I204824540"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5068576783"],"corresponding_institution_ids":["https://openalex.org/I204824540"],"apc_list":null,"apc_paid":null,"fwci":14.3062,"has_fulltext":false,"cited_by_count":39,"citation_normalized_percentile":{"value":0.98956781,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":94,"max":99},"biblio":{"volume":null,"issue":null,"first_page":"69","last_page":"92"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11800","display_name":"User Authentication and Security Systems","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11800","display_name":"User Authentication and Security Systems","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11241","display_name":"Advanced Malware Detection Techniques","score":0.9922999739646912,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11644","display_name":"Spam and Phishing Detection","score":0.980400025844574,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/captcha","display_name":"CAPTCHA","score":0.9889050722122192},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6330778002738953},{"id":"https://openalex.org/keywords/usability","display_name":"Usability","score":0.6101275086402893},{"id":"https://openalex.org/keywords/computer-security","display_name":"Computer security","score":0.5199681520462036},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.376557320356369},{"id":"https://openalex.org/keywords/human\u2013computer-interaction","display_name":"Human\u2013computer interaction","score":0.2384968400001526}],"concepts":[{"id":"https://openalex.org/C163339463","wikidata":"https://www.wikidata.org/wiki/Q484598","display_name":"CAPTCHA","level":2,"score":0.9889050722122192},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6330778002738953},{"id":"https://openalex.org/C170130773","wikidata":"https://www.wikidata.org/wiki/Q216378","display_name":"Usability","level":2,"score":0.6101275086402893},{"id":"https://openalex.org/C38652104","wikidata":"https://www.wikidata.org/wiki/Q3510521","display_name":"Computer security","level":1,"score":0.5199681520462036},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.376557320356369},{"id":"https://openalex.org/C107457646","wikidata":"https://www.wikidata.org/wiki/Q207434","display_name":"Human\u2013computer interaction","level":1,"score":0.2384968400001526}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/978-981-13-1483-4_4","is_oa":false,"landing_page_url":"https://doi.org/10.1007/978-981-13-1483-4_4","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Advances in Cyber Security: Principles, Techniques, and Applications","raw_type":"book-chapter"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Peace, Justice and strong institutions","id":"https://metadata.un.org/sdg/16","score":0.75}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":87,"referenced_works":["https://openalex.org/W18310804","https://openalex.org/W112869242","https://openalex.org/W182783924","https://openalex.org/W1488616864","https://openalex.org/W1512545293","https://openalex.org/W1549580204","https://openalex.org/W1552934261","https://openalex.org/W1560502112","https://openalex.org/W1562671739","https://openalex.org/W1583950051","https://openalex.org/W1587820067","https://openalex.org/W1603565383","https://openalex.org/W1667580224","https://openalex.org/W1688746682","https://openalex.org/W1923586579","https://openalex.org/W1934382142","https://openalex.org/W1969420741","https://openalex.org/W1969670714","https://openalex.org/W1971657180","https://openalex.org/W1974008446","https://openalex.org/W1987153840","https://openalex.org/W1992957037","https://openalex.org/W1993981351","https://openalex.org/W2000600322","https://openalex.org/W2001771035","https://openalex.org/W2003735219","https://openalex.org/W2009095456","https://openalex.org/W2015824828","https://openalex.org/W2020999234","https://openalex.org/W2022710553","https://openalex.org/W2026633897","https://openalex.org/W2027237225","https://openalex.org/W2030734759","https://openalex.org/W2032009241","https://openalex.org/W2032225361","https://openalex.org/W2038022810","https://openalex.org/W2043165161","https://openalex.org/W2045782640","https://openalex.org/W2050629718","https://openalex.org/W2055013232","https://openalex.org/W2060853104","https://openalex.org/W2068963333","https://openalex.org/W2075785508","https://openalex.org/W2077430078","https://openalex.org/W2080592425","https://openalex.org/W2082839416","https://openalex.org/W2084062832","https://openalex.org/W2088301450","https://openalex.org/W2099256741","https://openalex.org/W2105523261","https://openalex.org/W2107612984","https://openalex.org/W2108290480","https://openalex.org/W2108724351","https://openalex.org/W2112981015","https://openalex.org/W2113321599","https://openalex.org/W2115601549","https://openalex.org/W2116241551","https://openalex.org/W2120308327","https://openalex.org/W2125561172","https://openalex.org/W2129091997","https://openalex.org/W2129824148","https://openalex.org/W2131572598","https://openalex.org/W2138992572","https://openalex.org/W2140257942","https://openalex.org/W2141282920","https://openalex.org/W2144409202","https://openalex.org/W2145482038","https://openalex.org/W2147019420","https://openalex.org/W2153601419","https://openalex.org/W2156749117","https://openalex.org/W2168727550","https://openalex.org/W2171973097","https://openalex.org/W2188737212","https://openalex.org/W2196513764","https://openalex.org/W2283942345","https://openalex.org/W2294312922","https://openalex.org/W2380581874","https://openalex.org/W2484995033","https://openalex.org/W2528437680","https://openalex.org/W2561675875","https://openalex.org/W2595089739","https://openalex.org/W2608745566","https://openalex.org/W2619304499","https://openalex.org/W2766473095","https://openalex.org/W4254515799","https://openalex.org/W6607551674","https://openalex.org/W6685257381"],"related_works":["https://openalex.org/W2748952813","https://openalex.org/W3134776999","https://openalex.org/W2028308373","https://openalex.org/W2064097623","https://openalex.org/W1966530388","https://openalex.org/W1975364925","https://openalex.org/W2566963304","https://openalex.org/W2111502540","https://openalex.org/W1502766620","https://openalex.org/W4366994647"],"abstract_inverted_index":null,"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":5},{"year":2024,"cited_by_count":6},{"year":2023,"cited_by_count":8},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":7},{"year":2020,"cited_by_count":8},{"year":2019,"cited_by_count":2}],"updated_date":"2026-08-04T08:18:43.703281","created_date":"2025-10-10T00:00:00"}