The domain name system (DNS) is effectively the Internet’s address book; it enables website names to be matched to their corresponding registered IP addresses. But illicit alteration of web queries can point end users or services to rogue IP addresses and route them to illegitimate servers for the purpose of data theft. The Domain Name System Security Extensions (DNSSEC) have been created in response to this threat. DNSSEC is a mechanism that involves the use of digital signatures to enable servers to authenticate and verify the integrity of DNS responses to queries.


More than: https://www.entrust.com/digital-security/hsm/solutions/use-case/credentialing-and-pki-applications/dnssec