ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,432,061, issued on Sept. 30, was assigned to HITACHI SOLUTIONS LTD. (Tokyo).
"Content protection system" was invented by Takayuki Suzuki (Tokyo) and Hisayoshi Sato (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An connection apparatus receives a purchase desire notification including a public key from another connection apparatus via a blockchain network and transmits an encrypted content key acquired by encrypting a content key using the public key to the other connection apparatus via the blockchain network. The other connection apparatus transmits the purchase desire notification to the one connection apparatus and transmits transmission sour...