проверка отзыва сертификата(A way to see if a certificate used to sign a message is valid. Outlook can check the status of the certificate from the issuing certification authority's database)
точка распространения списка отзыва сертификатов(A certificate extension that indicates where the certificate revocation list for a CA can be retrieved. It can contain none, one, or many HTTP, file, or LDAP URLs)
