US Patent Issued to NIPPON TELEGRAPH AND TELEPHONE on Aug. 5 for "Cipher system, encryption apparatus, decryption apparatus, method, and program" (Japanese Inventor)

ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,381,736, issued on Aug. 5, was assigned to NIPPON TELEGRAPH AND TELEPHONE Corp. (Tokyo).

"Cipher system, encryption apparatus, decryption apparatus, method, and program" was invented by Keita Kusagawa (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cipher system that performs encryption and decryption by a public key encryption scheme including schemes of tag-based encryption, weak commitment, and message authentication code, is configured to, using a security parameter, generate an encryption key, a decryption key, and a common parameter, and use the encryption key and the common parameter as an encryption key and the decryption key as a decrypt...