Security

Stylized illustration of a public key handshake between a browser and a relying party server.

Inside WebAuthn: How Passkeys Really Work Under the Hood

WebAuthn replaces shared secrets with public key cryptography bound to a device. This post walks through the registration and authentication ceremonies, the role of authenticators and the client, and why passkeys are phishing-resistant by construction.

Network packets traveling along a glowing path representing a TLS 1.3 0-RTT handshake.

Inside TLS 1.3 Zero Round-Trip Resumption: Architecture, Trade-Offs, and Production Deployment

How TLS 1.3 0-RTT cuts handshake latency to a single round trip — and the replay, forward-secrecy, and operational trade-offs you need to understand before turning it on.

Abstract representation of encrypted network traffic and connection resumption between client and server.

Implementing TLS 1.3 Zero Round-Trip Resumption: Mechanisms, Pitfalls, and Production Deployment

How TLS 1.3 0-RTT resumption actually works on the wire, why replay attacks make it risky for non-idempotent requests, and the patterns real teams use to deploy it safely behind NGINX, Envoy, and HAProxy.

Abstract diagram showing payment service mesh with redundant nodes and encrypted transaction flows.

Architecting Resilient Payment Systems: Scalable Architecture Patterns and Security Best Practices

How to design payment systems that survive traffic spikes, partial outages, and adversarial pressure without losing a single cent. Patterns, trade-offs, and security primitives that actually ship.

Illustration of encrypted data flowing through a network tunnel.

Mastering TLS 1.3 Zero Round-Trip Resumption: Latency Optimization, Security Trade-offs, and Real-World Implementation

Zero round‑trip resumption in TLS 1.3 can cut handshake latency dramatically while preserving strong security—learn the patterns, pitfalls, and production‑ready implementations.