JB 2518-1978 组合机床通用部件 风动动力头参数、互换尺寸
作者:标准资料网 时间:2024-05-25 14:09:20 浏览:9751
来源:标准资料网
基本信息
标准名称: | 组合机床通用部件 风动动力头参数、互换尺寸 |
中标分类: |
机械 >>
金属切削机床 >>
组合机床 |
替代情况: | 被JB/T 2462.22-99代替 |
发布日期: | |
实施日期: | 2004-06-01 |
首发日期: | |
作废日期: | 2000-01-01 |
出版日期: | |
页数: | 2页 |
适用范围
没有内容
前言
没有内容
目录
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引用标准
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所属分类: 机械 金属切削机床 组合机床
【英文标准名称】:Informationtechnology-Opensystemsinterconnection-Securityframeworksforopensystems-Non-repudiationframework
【原文标准名称】:信息技术.开放系统互连.开放系统用安全帧.非废弃帧
【标准号】:BSISO/IEC10181-4-1997
【标准状态】:现行
【国别】:英国
【发布日期】:1997-09-15
【实施或试行日期】:1997-09-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:通信规程;验证;算法;开放系统互连;计算机间通信;目标(信息系统);数据存储保护;数据传输;数据处理;数据传送;信息交流;数据安全
【英文主题词】:Communicationprocesses;Dataprocessing;Guidelines;Informationinterchange;Informationtechnology;Networkinterconnection;Opensystemsinterconnection;OSI;Safety
【摘要】:ThisRecommendation|InternationalStandardaddressestheapplicationofsecurityservicesinanOpenSystemsenvironment,wheretheterm"OpenSystems"istakentoincludeareassuchasDatabase,DistributedApplications,OpenDistributedProcessingandOSI.TheSecurityFrameworksareconcernedwithdefiningthemeansofprovidingprotectionforsystemsandobjectswithinsystems,andwiththeinteractionsbetweensystems.TheSecurityFrameworksarenotconcernedwiththemethodologyforconstructingsystemsormechanisms.TheSecurityFrameworksaddressbothdataelementsandsequencesofoperations(butnotprotocolelements)whichareusedtoobtainspecificsecurityservices.Thesesecurityservicesmayapplytothecommunicatingentitiesofsystemsaswellastodataexchangedbetweensystems,andtodatamanagedbysystems.ThisRecommendation|InternationalStandard:-definesthebasicconceptsofNon-repudiation;-definesgeneralNon-repudiationservices;-identifiespossiblemechanismstoprovidetheNon-repudiationservices;-identifiesgeneralmanagementrequirementsforNon-repudiationservicesandmechanisms.Aswithothersecurityservices,Non-repudiationcanonlybeprovidedwithinthecontextofadefinedsecuritypolicyforaparticularapplication.ThedefinitionsofsecuritypoliciesareoutsidethescopeofthisRecommendation|InternationalStandard.ThescopeofthisRecommendation|InternationalStandarddoesnotincludespecificationofdetailsoftheprotocolexchangeswhichneedtobeperformedinordertoachieveNon-repudiation.ThisRecommendation|InternationalStandarddoesnotdescribeindetailtheparticularmechanismsthatcanbeusedtosupporttheNon-repudiationservicesnordoesitgivedetailsofthesupportingsecuritymanagementservicesandprotocols.Someoftheproceduresdescribedinthisframeworkachievesecuritybytheapplicationofcryptographictechniques.Thisframeworkisnotdependentontheuseofaparticularcryptographicorotheralgorithmoronparticularcryptographictechniques(i.e.symmetricorasymmetric)althoughcertainclassesofNon-repudiationmechanismsmaydependonparticularalgorithmproperties.Indeeditislikely,inpractice,thatanumberofdifferentalgorithmswillbeused.Twoentitieswishingtousecryptographically-protecteddatamustsupportthesamecryptographicalgorithm.[|NOTE-AlthoughISOdoesnotstandardizecryptographicalgorithms,itdoesstandardizetheproceduresusedtoregistertheminISO/IEC9979.]Anumberofdifferenttypesofstandardcanusethisframeworkincluding:1)standardsthatincorporatetheconceptofNon-repudiation;2)standardsthatspecifyabstractservicesthatincludeNon-repudiation;3)standardsthatspecifyusesofaNon-repudiationservice;4)standardsthatspecifythemeansofprovidingNon-repudiationwithinanopensystemarchitecture;and5)standardsthatspecifyNon-repudiationmechanisms.Suchstandardscanusethisframeworkasfollows:-standardsoftype1),2),3),4)or5)canusetheterminologyofthisframework;-standardsoftype2),3),4)or5)canusethefacilitiesdefinedinclause7;and-standardsoftype5)canbebasedupontheclassesofmechanismdefinedinclause8.
【中国标准分类号】:L79
【国际标准分类号】:35_100_01
【页数】:32P.;A4
【正文语种】:英语
基本信息
标准名称: | 单端内启动荧光灯 |
中标分类: |
电工 >>
电气照明 >>
电光源产品 |
发布日期: | |
实施日期: | 1985-09-01 |
首发日期: | |
作废日期: | |
出版日期: | |
适用范围
没有内容
前言
没有内容
目录
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所属分类: 电工 电气照明 电光源产品