ALEXANDRIA, Va., April 9 -- United States Patent no. 12,273,342, issued on April 8, was assigned to MasterCard International Inc. (Purchase, N.Y.).

"Secure server client interaction" was invented by Mehdi Collinge (Mont-Sainte-Aldegonde, Belgium) and Omar Laazimani (London).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of maintaining a secure relationship between a client device and a server is described. The client device receives a first challenge from the server and determines and provides a first response to the first challenge. A cookie is established associated with the secure relationship. This cookie is shared between the client and the server. To establish the secure relationship in a later...