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【英文标准名称】:InformationtechnologySecuritytechniquesCheckcharactersystemsAdoptedbyINCITS
【原文标准名称】:信息技术.安全技术.INCITS采用校验字符系统
【标准号】:ANSIINCITS/ISO/IEC7064-2003
【标准状态】:现行
【国别】:美国
【发布日期】:2003-02-15
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:ThisInternationalStandardspecifiesasetofcheckcharactersystemscapableofprotectingstringsagainsterrorswhichoccurwhenpeoplecopyortypedata.Thestringsmaybeoffixedorvariablelengthandmayhavecharactersetswhicharea)numeric(10digits:0to9);b)alphabetic(26letters:AtoZ);andc)alphanumeric(lettersanddigits).Embeddedspacesandspecialcharactersareignored.ThisInternationalStandardspecifiesconformancerequirementsforproductsdescribedasgeneratingcheckcharactersorcheckingstringsusingthesystemsgiveninthisInternationalStandard.Thesecheckcharactersystemscandetect:a)allsinglesubstitutionerrors(thesubstitutionofasinglecharacterforanother,forexample"4234"for"1234).;b)allornearlyallsingle(local)transpositionerrors(thetranspositionoftwosinglecharacters,eitheradjacentorwithonecharacterbetweenthem,forexample"12354"or"12543"for"12345.);c)allornearlyallcircularshifterrors(circularshiftsofthewholestringtotheleftorright);d)ahighproportionofdoublesubstitutionerrors(twoseparatesinglesubstitutionerrorsinthesamestring,forexample"1234587"for"1234567)";ande)ahighproportionofallothererrors.ThisInternationalStandardexcludessystemsdesignedspecificallyto:a)permitbotherrordetectionandautomaticcorrection;b)detectdeliberatefalsification;andc)checkstringsinterchangedsolelybetweenmachines.ThisInternationalStandardisforuseininformationinterchangebetweenorganizations.Itisalsostronglyrecommendedforuseininternalinformationsystems.
【中国标准分类号】:L71
【国际标准分类号】:35_040
【页数】:
【正文语种】:英语