Karim Helmy

The Definitive Guide to Bitcoin Privacy & Surveillance — Privacy techniques built for Bitcoin: a deep dive analysis

Transacting bitcoin free of surveillance Remaining private while using Bitcoin is difficult. Due to the base layer’s transparency, observers can easily deduce information about the network’s users. A user’s financial history is effectively public unless they take measures to transact off-chain or use methods to obfuscate the transaction path of their coins. To add to […]
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Aug 17, 2020, 7:11PM UTC

Exchange Proofs of Reserves & Solvency: a mechanical explanation

Not Your Keys… Not your keys, not your coins is a common aphorism in the cryptocurrency world. Because cryptocurrencies are bearer assets, users who store funds with a custodian lose out on seizure-resistance and self-sovereignty, two of the key benefits of cryptocurrency. The history of the space is littered with exchanges who have lost user […]
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Jul 20, 2020, 4:03PM UTC

The Definitive Guide to Bitcoin Privacy & Surveillance: The need for financial privacy

The Soul of Bitcoin An early draft of the coronavirus stimulus plan written by House Democrats planned to create a digital dollar. Facebook’s Libra is slowly moving through government hurdles. State-backed currencies are gaining traction worldwide with China leading the path. Former CFTC Chairman Christopher Giancarlo has launched the Digital Dollar Foundation to pioneer advocacy […]
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Jul 8, 2020, 6:33PM UTC

Tor: Private Internet Access

Privacy on the Internet Browsing the internet is not private. Internet users’ internet service providers (ISPs) can track which websites they visit and sell that information to third parties; they may also be coerced into reporting it to the government or a legal plaintiff. A user’s ISP, and by extension, their government, can limit their […]
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Dec 26, 2019, 11:00PM UTC

JoinMarket: An incentivized CoinJoin marketplace

Karim Helmy is an independent analyst in the cryptocurrency space with a focus on mechanism design and data analysis. Reach out at [email protected] Bitcoin and Privacy Bitcoin’s base layer is incredibly transparent, allowing for easy auditability and simple transaction verification. These benefits are highly desirable, since they allow users to easily run full nodes, which […]
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Dec 11, 2019, 7:44PM UTC