Village

Friday 8-Aug-2025 10-11:50

Chelsea and Joseph

AML Cryptocurrency Compliance

Students receive exposure to the law side of cryptocurrency business, including certification, regulation, government policy, and risk assessment. Regulators around the world evaluate and implement diverse regulations governing the use and applications of Blockchain reflecting varying degrees of acceptance ranging from blanket prohibition to highly facilitating frameworks. Organisations, in turn, assess the related risks and legal challenges. This workshop considers emerging trends and security essentials vital for business and financial businesses, providing a brief overview of AML and KYC and suggestions to increase security and decrease risk exposure.

Friday 8-Aug-2025 11-11:50

Village organizers and special guest

Cryptocurrency Opening Keynote

Important: This presentation is not a workshop but rather a keynote speech, taking place at the Community Stage (not inside our) external room! Come to hear what to expect from your fellow enthusiastic hackers managing the Cryptocurrency areas at Defcon. Get a sneak peak of what each workshop teaches as well as the content of many other showcases and programs happening in the Cryptocurrency areas of Defcon.

Friday 8-Aug-2025 12-13:50

Undetermined, please stay tuned

Securing Cryptocurrency with Tor

One tool for securing transaction identities in cryptocurrency networks is Tor. In this workshop you learn three different ways Tor can defeat privacy attacks, as well as the value of such identity security. Your team will practice testnet transactions with and without Tor, to identify possible vulnerabilities.

Friday 8-Aug-2025 14-15:50

Chloe and Wei Hong

Red Teaming Financial Defenses

This workshop flips the script on financial security, focusing on a practical, hands-on level where attendees will learn by doing. Attendees will step into the shoes of sophisticated attackers targeting the interconnected financial ecosystem. Guided by us - Chloe, with experience in architecting B2B fraud solutions for acquiring banks in Singapore, and Weihong, with hands-on experience building ML-based KYC/liveness detection and rule-based risk systems for new user onboarding at OKX (a crypto exchange) - participants will learn how to think offensively.

Friday 8-Aug-2025 16-17:50

George and utvecklas

Evolution and History of Drain and Approval Attacks

This interactive workshop explores the history and evolution of draining attacks across major blockchains such as Ethereum, Solana, and TON. Participants will witness live demonstrations of various draining techniques, from early ERC-20 approval abuse to sophisticated token spoofing. Learn to recognize, trace, and defend against these exploits while discussing popular laundering methods and current security measures. A final group challenge will involve tracking an attacker's wallet and evaluating how to recover stolen funds.

Saturday 9-Aug-2025 10-11:50

Chelsea and Veronika

Cryptocurrency Enforcement Actions

Multiple agencies have attempted to regulate cryptocurrencies through various means. This workshop will begin with a short presentation about the different organizations with an interest in regulating cryptocurrency (SEC, CFTC, IRS, and DOJ) and provide examples of enforcement actions. Next, participants will break out into discussion groups to consider the pros and cons of regulation by enforcement. Then, participants will be given a hypothetical cryptocurrency and be assigned a role either as a 'regulator' or as a 'developer.' The participants will engage in a settlement type discussion to determine if the cryptocurrency should be regulated under one agency, multiple agencies, or not at all.

Saturday 9-Aug-2025 11-11:50

Village organizers and special guest

Cryptocurrency Opening Keynote

Important: This presentation is not a workshop but rather a keynote speech, taking place at the Community Stage (not inside our) external room! Come to hear what to expect from your fellow enthusiastic hackers managing the Cryptocurrency areas at Defcon. Get a sneak peak of what each workshop teaches as well as the content of many other showcases and programs happening in the Cryptocurrency areas of Defcon.

Saturday 9-Aug-2025 12-13:50

To be determined, please stay tuned

Hacking Custody and Exchanges

Cryptocurrency exchanges have the reputation of keeping 'not your keys so not your coins', but we analyze further to understand what technology powers them and which security aspects serve users. In this hour we use tools like Helloex and Octobot to build our own experimental testnet exchange. Your team divides into exchange providers maintaining stability and opportunistic traders taking advantage of system loopholes. A group discussion finally concludes under which conditions cryptocurrency exchanges provide security and value.

Saturday 9-Aug-2025 14-15:50

Michael and Param

Applied Cryptocurrency Hardware

Using an electronic circuit camera, we zoom in on cryptosecure devices and their circuits. Descriptions of existing cryptocurrency hardware lead to consideration of future integrations in the physical world and how secure elements work. We pass around a showcase of half a dozen wallets and similar hardware, as well as Nitrokeys (for defence) and ChipWhisperers (for attack.) We get set up with a set of hardware development software tools, and consider the physical production workflow that top manufacturers follow in high security areas.

Saturday 9-Aug-2025 16-17:50

Dan and Diego

Cryptocurrency Nodes and Relays

Cryptocurrency nodes validate and relay transactions across the network. Like servers in a traditional financial system, nodes store a copy of the blockchain and enforce the network's rules. Many of us want to run their own node for reasons of security, convenience, and independence of other people's node configurations. Come to understand nodes, build your own, and explore configurations to test wallet applications on your new cryptocurrency node.

Sunday 10-Aug-2025 10-11:50

Undetermined, please stay tuned

Introduction to Cryptocurrency

This workshop covers the basics of cryptocurrency, beginning with a brief history of Bitcoin and culminating at the present day. The exercises cover the pros and cons of the fundamentals of cryptocurrency and differentiate between three well-known cryptocurrencies. Next, a discussion will highlight the flurry of ICOs (Initial Coin Offerings) and various concerns by regulators (SEC, CFTC, CFPB, and IRS). Participants will discuss the different important aspects of security involved in cryptocurrency, detailing a 51% attack and the DAO attack. Then, participants will be given time to conceptualize their own cryptocurrency. Finally, participants will interact in groups, discussing which elements of their hypothetical cryptocurrency is superior to others.

Sunday 10-Aug-2025 12-13:50

HalFinneyIsMyHomeBoy

Self Custodial Wallet Use

The workshop will begin with brief presentation about cryptocurrency, exchanges, hardware wallets, hot wallets, cold wallets, and other introductory information needed to begin cryptocurrency transactions. Participants will be given a sample wallet for practice purposes only. Participants will be guided through the opening of a wallet, with a detailed discussion on public and private keys and the different types of wallets available for self custody and the different security features of wallets. The discussion will delve into hot security topics, including the importance of randomized seeds and consider a couple of case scenarios where wallets have been hacked due to a lack of security, followed by a discussion on how to prevent these types of security defects. Next, participants will create hot and a cold wallet, each with a twelve word seed. After completing set up of the cold wallet, participants will be required to simulate a lost/stolen/destroyed wallet and wipe the wallet and re-set up the wallet.

Allowance Program

With parents' permission, we give kids a standard allowance to the wallet of their choice.

Free Merchandise

Kids choose from a variety of cryptocurrency branded products including electronic devices.

Crypto Breakfast

Every morning we serve a banana pancake or crepe breakfast free of charge to families and kids.

Kastelo

The Kastelo devkit is a cryptocurrency developer kit including multiple secure elements to defend against hardware based (EMP or power glitch), firmware (bootloader dereference), and software (kernel or isolation) attacks.

Bleskomat

The Bleskomat ATM is the world's first offline Bitcoin Lightning ATM, enabling air gapped currency exchange. A mobile wallet on the customer phone requests a Lightning payment from the backend server on behalf of the ATM.

SeedSigner

SeedSigner is a Raspberry Pi based device used to sign Bitcoin transactions from verifiably air-gapped, stateless signing hardware. SeedSigner secures user data with trustless private key generation and multi-signature configuration.

Featured DJ

Between workshops and security challenges, relax on a sofa while enjoying the video loops and music selections by our featured DJ.

Second Reality

This is an IBM PC compatible demo created by the Finnish demogroup Future Crew. It debuted at the Assembly 1993 demoparty on July 30, 1993, where it was entered into the PC demo competition, and finished in first place with its demonstration of 2D and 3D computer graphics rendering. The demo was released to the public in October 1993. It is considered to be one of the best demos created during the early 1990s on the PC; in 1999 Slashdot voted it one of the 'Top 10 Hacks of All Time.' Its source code was released in a GitHub repository as public domain software using the Unlicense on the 20th anniversary of the release on 1 August 2013.

Blunderbuss

Though it was created for fun over a couple of days, with over a million particles in motion at any one time, Blunderbuss is anything but a blunt weapon. The demo features what looks like a burning match head, with wisps of smoke curling away from it under the influence of a slight breeze. An acoustic guitar and vocal plays in the background. As the demo unfolds, the smoke sometimes moves as if responding to a gust of wind, and takes on the shape of a word from the song.

Elevated

Show people Elevated and most will be mildly impressed. Show them the size of the executable, however, and they'll immediately want to see it again. Elevated is just 4kB long and yet contains a near photo-realistic fly-through of a mountainous landscape. It's all generated entirely in real-time – including camera motion blur. The trick to packing so much into so little space is a powerful graphics card.

Wing It!

An uptight engineer gets an unwelcome visit from a enthusiastic wannabe-pilot, causing both of them to be launched into the air inside an out-of-control space shuttle.

Charge

In an energy-scarce dystopia, an old destitute man breaks into a battery factory but soon finds himself confronted by a deadly security droid and no way out.

Sprite Fright

When a group of rowdy teenagers trek into an isolated forest, they discover peaceful mushroom creatures that turn out to be an unexpected force of nature.