ALEXANDRIA, Va., June 16 -- United States Patent no. 12,309,285, issued on May 20, was assigned to NIPPON TELEGRAPH AND TELEPHONE Corp. (Tokyo).

"Identifier change management apparatus, identifier change management method, and identifier change management program" was invented by Shigeru Fujimura (Musashino, Japan), Shigenori Ohashi (Musashino, Japan) and Atsushi Nakadaira (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An identifier change management apparatus according to one embodiment includes: a key management unit configured to manage a group of private keys including a first private key; a message input unit configured to receive a message; a transaction issuing unit configured to iss...