Hashcash is a proof-of-work system used to limit email spam and denial-of-service attacks. Hashcash was proposed in 1997 by Adam Back and described more...

with minimal effort on their part. The concept was first implemented in Hashcash by Moni Naor and Cynthia Dwork in 1993 as a way to deter denial-of-service...

He is the CEO of Blockstream, which he co-founded in 2014. He invented Hashcash, which is used in the bitcoin mining process. Back was born in London,...

Reusable Proofs of Work proposal, which itself was based on Adam Back's 1997 Hashcash proposal. Bitcoin, released in 2009, was the first widespread implementation...

The concept was independently rediscovered by Adam Back who developed Hashcash, a proof-of-work scheme for spam control in 1997. The first proposals for...

the service provider. One popular system – used in Bitcoin mining and Hashcash – uses partial hash inversions to prove that work was done, to unlock a...

a proof-of-work algorithm (more precisely, as the hash function in the Hashcash proof-of-work algorithm). It was first implemented for Tenebrix (released...

may look similar to hashcash, except that the receiver side verification is a negligible amount of work, while a typical hashcash algorithm would require...

Barely Sociable claimed that Adam Back, inventor of bitcoin predecessor Hashcash, is Nakamoto. Back subsequently denied this. Charles Hoskinson, founder...

various auction protocols fall under the umbrella of Financial cryptography. Hashcash is being used to limit spam. Financial cryptography has been seen to have...

denial-of-service. Computer security Intrusion-prevention system Proof-of-work system Hashcash Guided tour puzzle protocol Juels, Ari; Brainard, John (1999). "Client...

Nakamoto in 2008. Nakamoto improved the design in an important way using a Hashcash-like method to timestamp blocks without requiring them to be signed by...

at the Wayback Machine and the Cloudmark Authority plugins (commercial) Hashcash email stamps based on proof-of-work Sender Policy Framework and DomainKeys...

functions Comparison of cryptography libraries Hash function security summary Hashcash HMAC International Association for Cryptologic Research (IACR) Trusted...

1992. The idea was independently rediscovered by Adam Back who developed hashcash, a proof-of-work scheme for spam control in 1997. The first proposals for...

to send large numbers of e-mails.[citation needed] Proof-of-work system Hashcash Internet Mail 2000 Anti-spam techniques "The Penny Black". postalmuseum...

expert, and one of the people who factored RSA-129 Adam Back: inventor of Hashcash and of NNTP-based Eternity networks; co-founder of Blockstream Jim Bell:...

computational effort, also known as proof-of-work — a key technology underlying hashcash and bitcoin. Her publications include: Dwork, Cynthia; Lynch, Nancy; Stockmeyer...

of Block.One Vitalik Buterin, founder of Ethereum Adam Back, author of Hashcash and CEO of Blockstream Wences Casares, CEO of Xapo David Chaum, computer...

or their ISP, or some other gatekeeper. Proof-of-work systems such as hashcash and Penny Black require that a sender pay a computational cost by performing...

Harry Hinsley • Harvest (computer) • HAS-160 • Hash-based cryptography • Hashcash • Hash chain • Hash function security summary • Hash list • Hasty Pudding...

March 2010 in preparation for the general election, and updated to use the Hashcash anti-spam plugin. The site became inactive for a while after the 2010 general...