Encra Blog
Engineering & Security
Deep-dives on encryption, tutorials for developers, and the story behind how Encra works.
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The Double Ratchet Algorithm: How Signal-Level Encryption Actually Works
A step-by-step visual walkthrough of the Double Ratchet — the cryptographic protocol behind Signal, WhatsApp, and Encra. Understand forward secrecy, break-in recovery, and why it's so hard to get right.
What Is Encryption? A Visual, Interactive Guide
From Caesar ciphers to AES-256 and public-key cryptography — an interactive walkthrough of how encryption works, why it matters, and what makes modern crypto unbreakable.
Add End-to-End Encrypted Chat to Your Next.js App in 10 Minutes
A practical walkthrough: install the SDK, wire up the hook, and have two users exchanging Signal-level encrypted messages before your coffee gets cold.
Why End-to-End Encryption Actually Matters (and Why Most Apps Get It Wrong)
Database encryption, TLS, and server-side secrets don't protect your users from you — or from attackers who compromise your server. Here's what real E2E encryption does differently.