Secure Delegation Response

The parent name server returns:
NS + glue, and DS + its RRSIG

    dig @127.0.0.1 +dnssec foo.child.sec.jinmei.org

    ;; AUTHORITY SECTION:
   child.sec.jinmei.org. 86400 IN NS ns.child.sec.jinmei.org.
   child.sec.jinmei.org. 86400 IN DS 8812 1 1 42DE26F06D174FC6E72780BC563B28546034F0D7
   child.sec.jinmei.org. 86400 IN RRSIG DS 1 4 86400 ...

   ;; ADDITIONAL SECTION:
   ns.child.sec.jinmei.org. 86400 IN A 192.168.0.3