DNSSEC stands for Domain Name System Security Extensions. It is a security protocol designed to ensure the integrity and authenticity of DNS data. DNS (Domain Name System) translates human-friendly domain names (such as example.nl) into IP addresses (such as 192.0.2.1), so that computers know where to find the website.
Why is DNSSEC necessary?
Standard DNS is not secure and is therefore vulnerable to DNS spoofing and man-in-the-middle attacks, where malicious actors can redirect traffic to fraudulent websites. This can lead to phishing or the interception of sensitive information, for example.
How does DNSSEC work?
DNSSEC uses a system of digital signatures to ensure that DNS data:
Authentic: They come from the correct source.
Unaltered: They have not been manipulated in transit.
When a DNS resolver looks up a domain name secured with DNSSEC, it checks:
Digital signature: Whether the DNS records are correctly signed.
Authenticity: Whether the signature originates from a trusted source.
Integrity: Whether the data has not been altered during transmission.
Benefits of DNSSEC:
Protection against DNS spoofing and cache poisoning.
Increased security for users exchanging sensitive data.
Confidentiality for websites and email services.
Disadvantages or challenges:
Complexity in implementation and maintenance.
If DNSSEC keys are not properly managed, this can lead to accessibility issues.
Not all network equipment and providers fully support DNSSEC.
