LATTICE-BASED PUBLIC KEY CRYPTOSYSTEM SHARING A PART OF PUBLIC KEYS IN COMMON, AND SERVER INCLUDED THEREIN

Abstract

A server for managing terminals that perform lattice-based public key cryptographic communication according to embodiments of the present disclosure is disclosed. Each of the terminals performs public key cryptographic communication based on a public key including a domain public key and an individual public key, and a randomly determined individual private key, wherein the individual public key is calculated according to the following mathematical formula: IP=f(CP,SK) (wherein IP is an individual public key, SK is an individual private key, CP is a domain public key, and f is an individual public key generation function), and wherein the server includes a communication circuit, a memory configured to store a program including instructions, and a processor that controls the server to perform a plurality of operations by executing the program stored in the memory.

CPC Classifications