Diffie-Hellman key exchange flowchart illustrates the mathematical protocol enabling two parties to establish a shared secret over an insecure channel without prior communication. Alice and Bob independently choose private keys, compute public values using modular exponentiation with agreed prime p and base g, then exchange public values to derive an identical shared secret. This architecture demonstrates why Diffie-Hellman remains foundational to TLS, SSH, and VPN protocols—an eavesdropper cannot derive the shared secret from intercepted public values. Security teams use this diagram to validate key exchange implementations, train staff on cryptographic handshakes, and document protocol compliance. Fork and customize this flowchart to illustrate variants like Elliptic Curve Diffie-Hellman or to embed in security documentation and training materials.