ALEXANDRIA, Va., May 5 -- United States Patent no. 12,621,123, issued on May 5, was assigned to AXELL Corp. (Tokyo).
"Encryption processing apparatus 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: "In order to realize four arithmetic operations in Integer-wise type TFHE, an encryption processing apparatus that processes a ciphertext is provided, the ciphertext being a fully homomorphic ciphertext that has, as a plaintext associated with an integer, a value with an error having a predetermined variance added thereto within a predetermined value range and that is able to be subjected to a predetermined operatio...