US Patent Issued to MITSUBISHI ELECTRIC on May 26 for "Ciphertext conversion system, ciphertext conversion method, and non-transitory computer readable medium" (Japanese Inventor)

ALEXANDRIA, Va., May 26 -- United States Patent no. 12,640,906, issued on May 26, was assigned to MITSUBISHI ELECTRIC Corp. (Tokyo).

"Ciphertext conversion system, ciphertext conversion method, and non-transitory computer readable medium" was invented by Yutaka Kawai (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A ciphertext conversion system (100) includes a conversion key generation device (600) and a conversion device (700). The conversion key generation device (600) performs encryption of a public-key encryption scheme using a public key and a first decryption enabling condition, so as to generate a first converted public-key ciphertext and a key corresponding to the first converted public-key ci...