ALEXANDRIA, Va., March 19 -- United States Patent no. 12,255,987, issued on March 18.
"System and method for secure detection of similarity and dissimilarity of events" was invented by Florian Kerschbaum (Waterloo, Canada), John Abraham Premkumar (Waterloo, Canada) and Xinda Li (Waterloo, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "Each of a plurality of clients encodes events as respective vectors and cooperatively choose a joint key. Each client then encrypts its event vector(s) using the joint key to form secret shares of a fixed value and then sends the encoded, encrypted vectors to a service-providing system that selects pairs of the vectors and determines a comparison value from a reconstruct...