DNSSEC is a security protocol for the Domain Name System (DNS). It enables the DNS to provide an enhanced level of security for the DNS records and for the DNS servers themselves.
DNSSEC can also help to deter spoofing and phishing attacks.
DNSSEC is enabled by default on most DNS servers. To use DNSSEC, the DNS client needs to know how to request it and how to use it.
DNSSEC works by using a chain of trust to validate DNS records. The DNS server asks the DNS root zone for a chain of trust anchors.
The DNS root zone is a collection of authoritative DNS servers that are trusted by all the DNS clients. The DNS root zone provides a chain of trust for the entire DNS.
Every DNS record has a signature that is created by the DNS server. The signature is a cryptographic hash of the DNS record.
The DNS server creates the signature using the DNS record’s contents and a secret key. The signature is signed with the DNS server’s secret key.
The DNS client uses the signature to verify the authenticity of the DNS record. The DNS client also uses the signature to determine whether the DNS record has been modified since it was signed.
DNSSEC helps to protect the DNS from attack. It can protect the DNS by preventing attackers from modifying DNS records.
It can also protect the DNS by preventing attackers from spoofing DNS records.
