Decryption condition adding device, cryptographic system and decryption condition adding… Grant DE-112014007226-B4 Germany 07 Sep 2023
Cryptographic system, master key update device, and master key update program Application JP-WO2016088251-A1 Japan 27 Apr 2017
ENCRYPTION SYSTEM, MASTER KEY UPDATING DEVICE, AND MASTER KEY UPDATING PROGRAM Application WO-2016088251-A1 World Intellectual Property Organisation (WIPO) 09 Jun 2016