сертификат клиента(A digital certificate that functions in a manner that is similar to a driver's license or passport. Client certificates can contain detailed identification information about the user and organization that issued the certificate)
проверка подлинности с сопоставлением SSL-сертификатов клиентов(A method of authentication where certificates are used on the client and a mapping is made on the server (or possibly on the Active directory domain controller) to determine which client certificates should be allowed access to the site)