{"id":"https://openalex.org/W4250519957","doi":"https://doi.org/10.1145/800213.806532","title":"Protection in the Hydra Operating System","display_name":"Protection in the Hydra Operating System","publication_year":1975,"publication_date":"1975-01-01","ids":{"openalex":"https://openalex.org/W4250519957","doi":"https://doi.org/10.1145/800213.806532"},"language":"en","primary_location":{"id":"doi:10.1145/800213.806532","is_oa":false,"landing_page_url":"https://doi.org/10.1145/800213.806532","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the fifth symposium on Operating systems principles  - SOSP '75","raw_type":"proceedings-article"},"type":"article","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/A5109560047","display_name":"Ellis Cohen","orcid":null},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Ellis Cohen","raw_affiliation_strings":[""],"affiliations":[{"raw_affiliation_string":"","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5112040309","display_name":"David A. Jefferson","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"David Jefferson","raw_affiliation_strings":[""],"affiliations":[{"raw_affiliation_string":"","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5109560047"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":6.7631,"has_fulltext":false,"cited_by_count":73,"citation_normalized_percentile":{"value":0.96864794,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":null,"issue":null,"first_page":"141","last_page":"160"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10400","display_name":"Network Security and Intrusion Detection","score":0.9973000288009644,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"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/T10400","display_name":"Network Security and Intrusion Detection","score":0.9973000288009644,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"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":0.996399998664856,"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/T12034","display_name":"Digital and Cyber Forensics","score":0.9918000102043152,"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/lernaean-hydra","display_name":"Lernaean Hydra","score":0.9618112444877625},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6770663261413574},{"id":"https://openalex.org/keywords/revocation","display_name":"Revocation","score":0.5252496600151062},{"id":"https://openalex.org/keywords/directory","display_name":"Directory","score":0.4768615663051605},{"id":"https://openalex.org/keywords/operating-system","display_name":"Operating system","score":0.3449132442474365},{"id":"https://openalex.org/keywords/computer-security","display_name":"Computer security","score":0.34000909328460693},{"id":"https://openalex.org/keywords/biology","display_name":"Biology","score":0.08871498703956604}],"concepts":[{"id":"https://openalex.org/C34781881","wikidata":"https://www.wikidata.org/wiki/Q170379","display_name":"Lernaean Hydra","level":2,"score":0.9618112444877625},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6770663261413574},{"id":"https://openalex.org/C2775892892","wikidata":"https://www.wikidata.org/wiki/Q6509517","display_name":"Revocation","level":3,"score":0.5252496600151062},{"id":"https://openalex.org/C2777683733","wikidata":"https://www.wikidata.org/wiki/Q201456","display_name":"Directory","level":2,"score":0.4768615663051605},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.3449132442474365},{"id":"https://openalex.org/C38652104","wikidata":"https://www.wikidata.org/wiki/Q3510521","display_name":"Computer security","level":1,"score":0.34000909328460693},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.08871498703956604},{"id":"https://openalex.org/C95444343","wikidata":"https://www.wikidata.org/wiki/Q7141","display_name":"Cell biology","level":1,"score":0.0},{"id":"https://openalex.org/C2779960059","wikidata":"https://www.wikidata.org/wiki/Q7113681","display_name":"Overhead (engineering)","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1145/800213.806532","is_oa":false,"landing_page_url":"https://doi.org/10.1145/800213.806532","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the fifth symposium on Operating systems principles  - SOSP '75","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/16","score":0.6299999952316284,"display_name":"Peace, Justice and strong institutions"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2128040437","https://openalex.org/W2381253015","https://openalex.org/W2093732113","https://openalex.org/W2141305934","https://openalex.org/W1859893720","https://openalex.org/W2268219566","https://openalex.org/W2008467200","https://openalex.org/W2089100900","https://openalex.org/W2963237481","https://openalex.org/W3187057705"],"abstract_inverted_index":{"This":[0],"paper":[1],"describes":[2],"the":[3,10,18,60],"capability":[4],"based":[5],"protection":[6,49],"mechanisms":[7,16,61],"provided":[8],"by":[9,38],"Hydra":[11,63],"Operating":[12],"System":[13],"Kernel.":[14],"These":[15],"support":[17],"construction":[19],"of":[20,46],"user-defined":[21],"protected":[22],"subsystems,":[23,28],"including":[24,51],"file":[25],"and":[26,55,57],"directory":[27],"which":[29],"do":[30],"not":[31],"therefore":[32],"need":[33],"to":[34,67],"be":[35],"supplied":[36],"directly":[37],"Hydra.":[39],"In":[40],"addition,":[41],"we":[42,58],"discuss":[43],"a":[44],"number":[45],"well":[47],"known":[48],"problems,":[50],"Mutual":[52],"Suspicion,":[53],"Confinement":[54],"Revocation,":[56],"present":[59],"that":[62],"supplies":[64],"in":[65],"order":[66],"solve":[68],"them.":[69]},"counts_by_year":[{"year":2023,"cited_by_count":2},{"year":2019,"cited_by_count":1},{"year":2013,"cited_by_count":2},{"year":2012,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}
