Websites prove their identity via security certificates. %1$S does not trust %2$S because it uses a security certificate that is not valid for %2$S.
Webguneek segurtasun-ziurtagirien bitartez frogatzen duten euren identitatea. %1$S ez da %2$S ostalariaz fio %2$S gunerako baliozkoa ez den segurtasun-ziurtagiria darabilelako.