.ngo|.ong support DNS Security Extensions (DNSSEC). DNSSEC is a secure version of DNS.
Cache poisoning, the unauthorized access and modification of DNS caches to intentionally spoof websites, hijack email, and even steal passwords has been a major vulnerability. DNSSEC ensures cache poisoning is prevented, that DNS data cannot be forged and that data originating from its stated source is not modified in transit.
Public Interest Registry was the first generic Top-Level Domain (gTLD) registry to fully deploy DNSSEC.