Congratulations to the teams in both Singapore and Senegal for signing their country-code top-level domains (ccTLDs) with DNSSEC back in September. According to Rick Lamb’s list of DNSSEC-signed TLDs, Singapore’s signature for the .SG domain was added to the root of DNS on September 22, and Senegal’s signature for .SN was added on September 30. 
This means that as of those dates, second-level domains under .SG and .SN could start receiving the added layer of security and trust possible with DNSSEC. In Singapore SGNIC started actively encouraging people to sign their domains. In Africa, ICANN’s Yaovi Atohoun wrote about how Senegal is the third African ccTLD to sign with DNSSEC this year.
I also added both countries to our weekly DNSSEC Deployment Maps so people can see them there. (And here’s a test of your geography: where are Senegal and Singapore?)
This is all great news as the world continues to add a layer of trust to answers from DNS by using DNSSEC. Congrats again to the teams in both countries!
If you would like to get started with DNSSEC, please visit our Start Here page to begin.
 To be precise, what happened is that the “Delegation Signer” or “DS” records for each TLD were added to the root of DNS. The DS record is a fingerprint of the DNSKEY used to sign the domain. It is included in the parent zone to create a “global chain of trust” from the root of DNS on down.