Diffie-Hellman Key Exchange

★★★★☆Undergraduate

📖Definition

Protocol allowing two parties to establish a shared secret over insecure channel

Public: g, p (prime)

A chooses a: A = g^a mod p

B chooses b: B = g^b mod p

Shared secret: K = g^ab mod p

예제 1

g=5, p=23, a=6, b=15

예제 2

A=8, B=19, K=2

TLS/SSL

VPN

SSH

#DH#키교환#key-exchange#protocol