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Rob Helmer's blog posts matching the tag: multiplayer

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Diagram comparing traditional JSON state (~250 bytes) versus bitboard state (~85 bytes) for efficient game state encoding.

3/9/2026 · 7 min read

Efficient Game State Encoding with Bitboards for Multiplayer

How bitboards and card bitsets compress game state to a fraction of JSON size for faster multiplayer sync and cloud saves.

Architecture diagram showing OAuth provider, auth worker encrypting PII with public key, ciphertext-only database, and separate email worker with private key.

3/24/2026 · 9 min read

Asymmetric Encryption for Player PII in Multiplayer Games

How HPKE encryption protects user email addresses and personal data so the server can't read them even if compromised.

Sequence diagram showing secure authentication flow with HttpOnly cookies between user, browser, auth server, and game server.

3/17/2026 · 7 min read

Building Secure Login Systems with HttpOnly Cookies

How HttpOnly cookies with CHIPS prevent XSS attacks and cross-site tracking while maintaining seamless authentication across subdomains.

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