U.S. Patent 11133931 was awarded to GREEN IT KOREA CO., LTD. on September 28, 2021 and is entitled “Security service providing apparatus and method for supporting lightweight security scheme.” The first named inventor is Chang Seop Park of Seongnam-si, . The abstract contains an overview of the patent disclosure:

The present invention relates to security service providing apparatus and method for supporting lightweight security which provides lightweight security by using an error coefficient and a hash of a chain block used for time synchronization with the terminal for generation of an encryption key to improve security complexity while securing security for communication with terminals and also securing security for an encryption key through the blockchain. According to the present invention, for security for the communication session between the service providing apparatus and the terminal, the encryption key of the terminal is generated as the hash through the hash algorithm by combining the time difference generated in the time synchronization process with the terminal and the hash generated based on the information related to the encryption key of the other terminal stored in the blockchain to generate a symmetrical encryption key which cannot be inferred and has high security. Link to Full Patent

This blockchain patent was originally filed on November 13, 2019  as U.S. Patent Application 16/683240 at the United Stated Patent and Trademark Office. The application was them awarded a patent grant and published as U.S. Patent 11133931. The assistant examiner was Hany S. Gadalla.

GREEN IT KOREA CO., LTD., who is the original assignee of this patent, has at least 1 total granted patents in the United States as of the date of this article. This blockchain patent has been cited 0 times by other U.S. patents according to our law firm research, and can be considered an innovative patent in the field of cryptocurrency and blockchain.

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