ALEXANDRIA, Va., May 5 -- United States Patent no. 12,621,120, issued on May 5, 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: "An operation by a full adder that achieves fully homomorphic encryption is speeded up. Ciphertexts are ciphertexts of fully homomorphic encryption that allow a logical operation to be performed without decryption. A sorting process is performed which rearranges the ciphertexts arranged in a predetermined order in accordance with a predetermined method. In the sorting process, a homomorphic operation based on a first c...