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The Bitcoin Game #75: 2014 Interview with Dr. Jochen "Johoe" Hoenicke

The Bitcoin Game

Release Date: 02/28/2020

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The Bitcoin Game

Tone Vays and Jimmy Song continue their series of interviews examining the current tensions between Bitcoin Knots and Bitcoin Core. Because Tone is only releasing this series as streaming video on X and YouTube, "The Bitcoin Game" podcast feed was revived to host this interview series for people who prefer a low-bandwidth audio podcast to consume this long-form content. This is Part 6 of the series, this time featuring Giacomo Zucco. The interview was recorded on November 13, 2025, in a side room at the Bitcoin Historico event in El Salvador.

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Tone Vays and Jimmy Song continue their series of interviews examining the current tensions between Bitcoin Knots and Bitcoin Core. Because Tone is only releasing this series as streaming video on X and YouTube, "The Bitcoin Game" podcast feed was revived to host this interview series for people who prefer a low-bandwidth audio podcast to consume this long-form content. This is Part 5 of the series, this time featuring Knut Svanholm. The interview was recorded on November 12, 2025, in a side room at the Bitcoin Historico event in El Salvador. The beginning of the recording has been edited to...

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Tone Vays came out of retirement as a content creator to host a new series of interviews focusing on the current tensions between Bitcoin Knots and Bitcoin Core. Together with Jimmy Song, he is speaking with a wide range of well-known Bitcoiners on all sides of the debate to help users understand what is at stake. Since Tone didn't set up an audio RSS feed for this series, and a lot of people prefer a low-bandwidth podcast over streaming video on YouTube or X, I brought this podcast feed out of retirement to make the audio easily available. This is Part 2 of the series, featuring Luke Dashjr...

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The Bitcoin Game

Welcome to episode 76 of The Bitcoin Game, sponsored by eToro. Andrew Tierney, otherwise known online as Cybergibbons, hacks everything from oil rigs to Cryptocurrency hardware wallets. We conducted this interview a bit before COVID-19 took over the planet, back when we were more worried about malware than going to the grocery store without an N95 mask. Andrew and I discuss hacking hardware wallets, IoT devices, home routers, his day job as a hacker for hire, and other stuff too.

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The Bitcoin Game #75: 2014 Interview with Dr. Jochen The Bitcoin Game #75: 2014 Interview with Dr. Jochen "Johoe" Hoenicke

The Bitcoin Game

Welcome to The Bitcoin Game, sponsored by eToro. I'm Rob Mitchell. One of my favorite old interviews is an exclusive with Dr. Jochen "Johoe" Hoenicke, the 2014 Bitcoin Hero. He rescued insecure Bitcoin from Blockchain.info wallets. A bit after this 2014 interview, Johoe responsibly published a side-channel attack on a TREZOR, which led to Satoshi Labs hiring him. Enjoy my first "rebroadcast" to celebrate 75, the only audio interview with Johoe that I'm aware of. Full show notes & links at TheBitcoinGame.com

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The Bitcoin Game #74: David Jevans of CipherTrace show art The Bitcoin Game #74: David Jevans of CipherTrace

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Welcome to episode 74 of The Bitcoin Game, sponsored by eToro.

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The Bitcoin Game #73: Tim Pastoor, P2P Identity show art The Bitcoin Game #73: Tim Pastoor, P2P Identity

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Tim Pastoor has been focused on peer-to-peer identity and reputation systems for the past five years, supporting Martti Malmi's work in the space (Martti was the first coder to work with Satoshi on Bitcoin). Twitter's Jack Dorsey recently got tons of attention promoting the goal of decentralized social media, and P2P identity may well be the base layer for such projects. Please check the full show notes with links at TheBitcoinGame.com.

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More Episodes

Welcome to episode 75 of The Bitcoin Game, sponsored by eToro. I'm Rob Mitchell.

I started podcasting in late 2014, and one of the greatest things to happen in those early episodes was landing an exclusive longform interview with Dr. Jochen "Johoe" Hoenicke, the 2014 Bitcoin Hero. Badass white hat Bitcoin hacker Johoe (at least that's what I call him) rescued insecure Bitcoin UTXOs from Blockchain.info wallets before they could be taken by less-scrupulous hackers. This was after his contributions to understanding the RNG issues with Android Bitcoin wallets in 2013. He also rescued insecure Bitcoin from one other platform, which he admits for the first time in this interview. Some months after this interview, Johoe responsibly published a side-channel attack on a TREZOR, which eventually led to Satoshi Labs hiring him as a TREZOR Cryptographer. Johoe's Bitcoin mempool stats site is yet another contribution he's made to the space.

This is the only audio (or video) interview with Johoe that I'm aware of, and it's worth a listen if you didn't catch it the first time. It's even educational, as Johoe explains concepts like how Bitcoin signatures work and what specifically went wrong with various wallets, in a way that's accessible for non-technical people like myself.

Hope you enjoy my first "rebroadcast" to celebrate 75!


EPISODE LINKS

Johoe first addresses repeating R value issue due to 2013 Android RNG bug
https://bitcointalk.org/index.php?topic=251743.msg2890179#msg2890179

Counterparty Bug first addressed by Johoe on BitcoinTalk.org
https://bitcointalk.org/index.php?topic=581411.msg6354731#msg6354731

Johoe discovers the recently compromised Blockchain.info addresses
https://bitcointalk.org/index.php?topic=581411.msg9774894#msg9774894

Blockchain.info Wallet
https://blockchain.info/wallet

Coinbase
https://www.coinbase.com

Counterparty Wallet
https://counterwallet.io

Johoe demonstrates TREZOR side channel attack (April 2015)
https://jochen-hoenicke.de/crypto/trezor-power-analysis

Satoshi Labs announces hiring Johoe as TREZOR Cryptographer
https://blog.trezor.io/ethical-hacker-and-bitcoin-hero-johoe-joins-satoshilabs-as-trezor-cryptographer-36c9a6b10d52

Johoe's Bitcoin Mempool Statistics site
https://jochen-hoenicke.de/queue/#0,all


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Bitcoin Keychains from BTCkeychain.com

While much of a Bitcoiner's time is spent in the world of digital assets, sometimes it's nice to own a physical representation of the virtual things you care about. For just the price of a cup of coffee or two (at Starbucks), you can own the world-famous Bitcoin Keychain.

As Seen On
The Guardian • TechCrunch • Engadget • Ars Technica • Popular Mechanics
Infowars • Maxim • Inc. • Vice • RT • Bitcoin Magazine • VentureBeat
PRI • CoinDesk • Washington Post • Forbes • Fast Company

Bitcoin Keychains - BTCKeychain.com


CREDITS

All music in this episode was created by me, or is from a jam with me, Mike Coleman and Steve Lunn.

The Bitcoin Game box art was created from an illustration by Rock Barcellos.

Lightning Network tips:
https://tippin.me/@TheBTCGame

Bitcoin tipping address: 3AYvXZseExRn3Dum8z9tFUk9jtQK6KMU4g


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