Certificatesare()documentsattestingtothe(请作答此空)ofapublickeytoanindividualorotherentity.Theyallowverificationoftheclaimthatagivenpublickeydoesinfactbelongtoagivenindividual.Certificateshelppreventsomeonefromusingaphonykeyto()someoneelse.Intheirsimplestform,Certificatescontainapublickeyandaname.Ascommonlyused,aCertificatealsocontainsan()date,thenameoftheCAthatissuedtheCertificate,aserialnumber,andperhapsotherinformation.Mostimportantly,itcontainsthedigital()ofthecertificateissuer.ThemostwidelyacceptedformatforcertificatesisX.509,thus,CertificatescanbereadorwrittenbyanyapplicationcomplyingwithX.509.
A.connecting B.binding C.composing D.conducting正确答案B
