Joao Peixoto
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Joao Peixoto

Joao Peixoto

San Francisco •
3 posts •
Chrome Key - A Cryptography Story
Chrome Extensions

Chrome Key - A Cryptography Story

We look into cryptography building blocks, key wrapping techniques, bad entropy (with a bruteforce attack), and finalize with a quick analysis on attack costs.

  • Joao Peixoto
    Joao Peixoto
6 min read
Chrome Key - A Standards Story
Webauthn

Chrome Key - A Standards Story

Building a WebAuthn protocol response for a credentials creation request, relying on standards such as the Web Cryptography API, CBOR, JSON Web Key among others.

  • Joao Peixoto
    Joao Peixoto
6 min read
Chrome Key - An Extension Story
Webauthn

Chrome Key - An Extension Story

We will be tackling the skeleton of a Chrome Extension that is capable of detecting Webauthn requests, both for registering and logging in, how different pieces of the extension communicate with each other, and lay the foundation for implementing an authenticator.

  • Joao Peixoto
    Joao Peixoto
5 min read
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