How SSH Key Authentication Works: Step-by-Step Diagram Explained #3764450 (License: Personal Use)

The diagram outlines a six-step SSH authentication process: (1) client initiates connection, (2) server sends a random challenge message, (3) client encrypts it with its private key, (4) encrypted message is sent back, (5) server decrypts using the client’s public key, and (6) if decrypted message matches the original, authentication succeeds. Keys are stored in standard locations like ~/.ssh/id_rsa and ~/.ssh/id_rsa.pub.

Used in DevOps, system administration, and cybersecurity educational content to explain secure remote access protocols; ideal for tutorials, documentation, or blog posts targeting IT professionals learning SSH fundamentals.