How does DNSSEC ensure data integrity using digital signatures?

How does DNSSEC ensure data integrity using digital signatures?

DNSSEC uses public key cryptography where each DNS zone has a pair of keys, a private key to sign DNS records and a public key to verify those signatures. When a DNS record is created, it is signed with the private key, generating a digital signature stored in a Resource Record Signature (RRSIG). When a resolver queries the record, it retrieves the RRSIG and the public key (DNSKEY) to verify the signature, ensuring the data has not been altered. Learn more.