US Patent Issued on April 21 for "Chain of authentication using public key infrastructure" (South Korean Inventor)

ALEXANDRIA, Va., April 21 -- United States Patent no. 12,609,841, issued on April 21.

"Chain of authentication using public key infrastructure" was invented by Unho Choi (Seoul, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for sequential authentication based on chain of authentication using public key infrastructure (PKI) is provided. The method includes generating, by a user, a first private key and a first public key corresponding to each other; generating, by an nth service provider, an nth private key and an nth public key corresponding to each other; transmitting, from the user to the nth service provider, a level n key; verifying, by the nth service provider, the level n key; gen...