Wei Dai is the name credited on the 1998 b-money proposal, an early design for electronic money and contract enforcement among pseudonymous participants. The Bitcoin whitepaper cites b-money once; that citation is evidence of a documented reference, not proof that Bitcoin copied the proposal wholesale.
What b-money proposed
Dai’s text describes two ways to maintain balances and transfer electronic money without a conventional bank. In one version, all participants keep account records; in another, a subset of servers maintains them while publishing records that users can check. Transfers are signed with public-key cryptography, and the proposal also sketches digitally signed contracts and dispute handling.
The document is a proposal, not a description of an operating b-money network or a traded coin. Its value for crypto history is in the problems it tried to solve: online exchange without a central issuer, public transaction announcements, and rules for contract enforcement.
The documented connection to Bitcoin
Satoshi Nakamoto’s Bitcoin whitepaper lists “b-money” by Wei Dai as reference [1]. In the body, that citation appears beside the requirement to announce transactions publicly; the paper then describes Bitcoin’s own method for agreeing on transaction order through proof of work. The sources establish a direct citation, while the exact degree of influence should not be overstated.
B-money and Bitcoin are not interchangeable designs. Dai’s proposal explores account databases and server-based variants, while Bitcoin specifies a peer-to-peer timestamp chain and a proof-of-work rule for resolving competing histories.
A namesake caution
Modern search results can combine biographies of different people who share the name Wei Dai. A current crypto venture investor using that name states on his own site that he is not the b-money author or the creator of Crypto++. That disclaimer is a reason to avoid transferring personal details between profiles without evidence.
For this entry, the supported subject is the historical author credited on the b-money text. Claims about his present-day identity, career, or connection to other projects need separate, reliable confirmation.
Social Media Sentiment
A March 2023 r/CryptoCurrency post presented b-money as an overlooked precursor to Bitcoin, and commenters discussed both its historical importance and the limits of claims about direct influence. This is one community thread about the proposal, not a measure of current opinion about Dai. Read the direct public discussion.
Last updated: 2026-10
Related Terms
See Also
- How Crypto Invented Its Own Language
- What Happens to Bitcoin When All 21 Million Are Mined?
- What Is Tokenomics — And Why It Determines Whether a Crypto Project Survives
- Exchange crypto with ChangeNOW — Compare exchange options through our ChangeNOW referral link.
Sources
- Wei Dai — Original b-money Proposal — The 1998 primary text describes Dai’s proposed electronic-cash protocols and contract rules.
- Satoshi Nakamoto — Bitcoin: A Peer-to-Peer Electronic Cash System — The whitepaper lists b-money as reference [1] and uses the citation in its discussion of public transaction announcements.
- Wei Dai — Professional Site and Name Disclaimer — The site of a present-day crypto investor named Wei Dai explicitly distinguishes its owner from the b-money author and Crypto++ creator.
- Satoshi Nakamoto Institute — Wei Dai Archive — The archive provides historical context and links to writings attributed to the cypherpunk author.