Bitcoin Illustrated

Episode 5: The 64-byte Transaction Bug Explained Simply

Garbled Circuits explained Next Up: How BitVM 3s uses Garbled Circuits

Episode 2: SegWit Address explained

Off-by-one difficulty bug explained

Great Consensus Cleanup explained Part1: Time Warp Attack

🎉👋 MEET MERKLE! 👋🎉 The name is a nod to the cryptographer Ralph Merkle who created a number of technologies that are fundamental to bitcoin. He is most famous for co-inventing public key cryptography and creating the Merkle trees we all know and love.

HELP! This little pangolin started hanging around our website. It’s been at least a month and it doesn’t look like it’s going away anytime soon. What should we name it?

Wormhole attack explained

Transaction Pinning explained

Rust 🦀 is quickly becoming one of the most important languages in the Bitcoin ecosystem. From wallet libraries to Lightning implementations, more projects are adopting Rust for its safety, performance, and reliability, traits that align perfectly with Bitcoin’s need for secure and predictable software. At the 2025 #BtrustDeveloperDay, @jrakibi explored this growing trend in his talk, breaking down what makes Rust different from other languages and why it’s reshaping how Bitcoin software is built. 🎥 Watch the session recording here: youtube.com/live/bDxhY5p1y… In our latest blog, Jamal expands on that talk, diving deeper into how Rust’s memory safety, high performance, and strong type system power projects like rust-bitcoin, BDK, rust-lightning, and Fedimint. He also shares lessons from contributing to Rust-Bitcoin and practical advice for developers looking to get started or contribute. 👉 Read the full article here: blog.btrust.tech/why-rust-is-be…

Coinjoin Explained

Full Node Architecture Explained

SHA-256 explained Part 2: Message Schedule

SHA-256 explained

🎉 Interactive SHA-256 visualizer SHA-256 is everywhere: bitcoin, TLS, Git, proofs, ... Yet most explanations skip the internal mechanics and jump straight from input → hash. We built a visual tool that shows what happens under the hood

The tool shows: - how the message is padded - how W[0..63] is generated - how all 64 rounds update the internal state all in an animated way hashexplained.com

Only ~24 hours left to apply for the 2026 ₿OSS Challenge 🚨

New Year, New You, New Career in Bitcoin Don’t miss your chance to get your dream job working on Bitcoin. Get funded by Spiral, BTrust, Blockstream, Brink and others to contribute to something meaningful. Apply for the BOSS Challenge today bosschallenge.xyz

There are about ~150 full-time contributors in all of bitcoin open source software (₿OSS) development and only ~40 of them work on Bitcoin Core. Bitcoin is not bulletproof. It needs constant maintenance and attention.

Start your career in bitcoin open source software (₿OSS)