Diffie-Hellman Key Exchange flowchart illustrates the step-by-step process for two parties (A and B) to establish a shared secret key over an insecure channel. Both parties agree on a large prime p and primitive root alpha, then independently generate private keys X_A and X_B, compute public keys Y_A and Y_B using modular exponentiation, and exchange these public values. Each party computes the identical shared key K using the received public key and their own private key, enabling secure symmetric encryption without transmitting the secret. This diagram demonstrates why Diffie-Hellman remains foundational to modern TLS handshakes and VPN protocols. Fork and customize this flowchart to document your organization's key exchange implementation or educational cryptography materials.