ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,719,657, issued on Aug. 25, was assigned to AXELL Corp. (Tokyo).

"Encryption processing device and encryption processing method" was invented by Yusuke Hoshizuki (Tokyo) and Kotaro Matsuoka (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A fully homomorphic encryption processing device processing a ciphertext is disclosed, the ciphertext has an integer as a plaintext. The encryption processing device includes a processor that executes a process including: obtaining a ciphertext by using a first polynomial and a second polynomial respectively including a second function and a third function, the second function and the third function being generate...