USPTO Grants PKI Authentication Chain Patent to Unho Choi

← USPTO Patent Grants

Chain of authentication using public key infrastructure

Grant US12609841B2 Kind: B2 Apr 21, 2026

Inventors

Unho Choi

Abstract

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; generating, by the nth service provider, a level (n+1) key by concatenating the level n key and the nth public key signed with the nth private key; and transmitting, by the nth service provider, the level (n+1) key to the user, where n is a natural number, and when n=1, the level 1 key is the first public key signed with the first private key.

CPC Classifications

H04L 9/3268 H04L 9/0825 H04L 9/14 H04L 9/3231 H04L 9/3263 H04L 9/3265 H04L 9/50 H04L 9/006 H04L 9/0891 H04L 9/3247 H04L 9/0643 H04L 2209/84 H04L 9/088 G06Q 20/227 G06Q 20/321 G06Q 20/3829 G06Q 20/389 G06Q 20/40145 G06Q 20/38215 G06Q 30/018 G06Q 20/065 G06Q 20/4015 G06Q 10/0832 B60L 53/30 B60L 2200/10 B60L 53/65 B60L 2260/32 G05D 1/0291 G05D 1/104 G05D 1/69 G05D 1/695 Y02T 10/70 Y02T 10/7072 Y02T 90/12 Y02T 90/167 Y04S 30/14

Filing Date

2024-04-11

Application No.

18632751

Claims

20

View original document →