java.security.cert
インタフェース 
X509Extension
クラス 
Certificate
Certificate.CertificateRep
CertificateFactory
CertificateFactorySpi
CRL
X509Certificate
X509CRL
X509CRLEntry
例外 
CertificateEncodingException
CertificateException
CertificateExpiredException
CertificateNotYetValidException
CertificateParsingException
CRLException