Short definition: A security protocol that uses cryptographic signatures to protect DNS responses from tampering or spoofing.
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What It Is
DNSSEC adds digital signatures to DNS records, allowing resolvers to verify that the information returned for a domain is authentic and unchanged. It prevents attackers from hijacking DNS traffic or redirecting users to fraudulent websites when records move across recursive and authoritative servers.
Why It Matters
Without DNSSEC, attackers can manipulate DNS responses to conduct phishing, credential theft, malware delivery, or man-in-the-middle attacks. Securing DNS integrity is essential for protecting brand trust, preventing redirections, and maintaining a reliable online presence.
How to Reduce Risk
- Enable DNSSEC at your domain registrar
- Rotate cryptographic keys regularly
- Monitor DNS record changes
- Host DNS with a provider that supports DNSSEC validation
Related Terms
External Resources
- ICANN DNSSEC Overview — https://www.icann.org/dnssec