US Patent Issued to Cisco Technology on March 18 for "Leveraging contextual metadata communication to improve DNS security" (Canadian Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,255,868, issued on March 18, was assigned to Cisco Technology Inc. (San Jose, Calif.).

"Leveraging contextual metadata communication to improve DNS security" was invented by Barry Qi Yuan (Vancouver, Canada) and Robert Edgar Barton (Richmond, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "Techniques for leveraging efficient metadata communications to improve domain name system (DNS) security are described. The DNS service uses a hash value to uniquely identify a client, and detect any change in metadata in order to keep policies up-to-date for the client. In an example method a first DNS query for a client device is intercepted. A cryptographic ...