US Patent Issued to Visa International Service Association on June 2 for "Threshold searchable symmetric encryption" (California Inventors)

ALEXANDRIA, Va., June 2 -- United States Patent no. 12,647,256, issued on June 2, was assigned to Visa International Service Association (San Francisco).

"Threshold searchable symmetric encryption" was invented by Saikrishna Badrinarayanan (Fremont, Calif.), Pratyay Mukherjee (Sunnyvale, Calif.) and Sikhar Patranabis (San Francisco).

According to the abstract* released by the U.S. Patent & Trademark Office: "A data owner can provide shares of a cryptographic key to N key servers. The N key servers can store the shares of a cryptographic key from the data owner such that T shares of the cryptographic key can be used to reconstruct the cryptographic key. A client computer can send a blinded query to T key servers of the N key severs, wherei...