Cryptography

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.

A stylized elliptic curve plotted on a coordinate grid.

The Geometric Intuition Behind Elliptic Curve Cryptography Basics

A deep dive into the geometry that powers elliptic curve cryptography, explaining points, tangents, and the group operation in an accessible way.

Illustration of encrypted data packets moving between client and server.

The Performance Tradeoffs of TLS 1.3 Zero Round‑Trip Resumption

A deep dive into TLS 1.3 0‑RTT resumption, covering handshake mechanics, latency benefits, replay risks, and practical configuration advice.

Diagram of an elliptic curve with points highlighted for addition.

The Mathematical Mechanics Behind Elliptic Curve Cryptography Fundamentals

A deep dive into the math that makes ECC secure, covering finite fields, point operations, and real‑world implementation tips.

An abstract illustration of intertwined mathematical symbols representing secret exchange.

The Mathematical Logic Behind Establishing Secrets Over Public Channels

A deep dive into the logic and algebra that enable secure key exchange on open networks, with practical examples and code snippets.