ALEXANDRIA, Va., July 30 -- United States Patent no. 12,375,286, issued on July 29, was assigned to NTT Research Inc. (Sunnyvale, Calif.).

"Decentralized multi-authority attribute-based encryption from bilinear diffie-hellman assumptions" was invented by Pratish Datta (Sunnyvale, Calif.), Ilan Komargodski (Tel Aviv, Israel) and Brent Waters (Austin, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to systems, methods, network devices, and machine-readable media for encrypting and decrypting messages in a decentralized multi-authority attribute-based encryption (MA-ABE) scheme for access structures described by monotone LSSS under the decisional bilinear Diffie-Hellman assumptions. T...