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
正确答案是B