Cloudflare已经支持dnssec了
CloudFlare’s mission is to make the web more secure. That’s why we spent the last two years working on Universal DNSSEC. With just a few clicks, you can now protect your domain name from DNS cache poisoning and man-in-the-middle attacks at no extra cost. All you need to do is upload one DNS record to your registrar.
If you care about the integrity and reputation of your brand, you should learn more about how DNSSEC helps prevent domain hijacking.