ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,438,696, issued on Oct. 7, was assigned to International Business Machines Corp. (New York).

"Copy-and-recurse operations for fully homomorphic encrypted database query processing" was invented by Hayim Shaul (Kfar Saba, Israel), Guy Moshkowich (Nes Ziyona, Israel) and Eyal Kushnir (Kfar Vradim, Israel).

According to the abstract* released by the U.S. Patent & Trademark Office: "Mechanisms are provided for performing a fully homomorphic encryption operation. The mechanisms generate, for a data set in a backend data store, a tree data structure comprising a hierarchy of nodes and edges connecting the nodes in a parent-child relationship. In response to receiving an encrypted query from...