Hashcash (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Hashcash" in English language version.

Last modified: 22:02:50, 28 August 2026 (UTC)

Ref.Un. Ref.Website

Global rank English rank

76hashcash.org

low place

66web.archive.org

1^st place

33doi.org

2^nd place

33microsoft.com

263^rd place

259^th place

22sourceforge.net

1,842^nd place

1,520^th place

22apache.org

4,440^th place

3,599^th place

22ietf.org

731^st place

625^th place

11kth.se

low place

11elliottback.com

low place

11arxiv.org

49^th place

31^st place

11semanticscholar.org

15^th place

8^th place

11ndss-symposium.org

low place

11worldcat.org

4^th place

11espacenet.com

950^th place

813^th place

apache.org (Global: 4,440^th place; English: 3,599^th place)

spamassassin.apache.org

"Mail::SpamAssassin::Plugin::Hashcash – perform hashcash verification tests". spamassassin.apache.org. Retrieved 11 November 2021.

bz.apache.org

"Bug 7728 – Remove HashCash support from trunk". Retrieved 22 September 2023.

arxiv.org (Global: 49^th place; English: 31^st place)

Rahimpour, Sonbol; Khabbazian, Majid (3 May 2021). "Hashcashed Reputation with Application in Designing Watchtowers". 2021 IEEE International Conference on Blockchain and Cryptocurrency (ICBC). IEEE. pp. 1–9. arXiv:2012.10825. doi:10.1109/icbc51069.2021.9461123. ISBN 978-1-6654-3578-9. S2CID 229340600.

doi.org (Global: 2^nd place; English: 2^nd place)

doi.org

Dwork, Cynthia; Naor, Moni (18 May 2001). "Pricing via Processing or Combatting Junk Mail". Advances in Cryptology — CRYPTO' 92. Lecture Notes in Computer Science. Vol. 740. Springer. pp. 139–147. doi:10.1007/3-540-48071-4_10. ISBN 978-3-540-57340-1.
Rahimpour, Sonbol; Khabbazian, Majid (3 May 2021). "Hashcashed Reputation with Application in Designing Watchtowers". 2021 IEEE International Conference on Blockchain and Cryptocurrency (ICBC). IEEE. pp. 1–9. arXiv:2012.10825. doi:10.1109/icbc51069.2021.9461123. ISBN 978-1-6654-3578-9. S2CID 229340600.

dx.doi.org

Rahimpour, Sonbol; Khabbazian, Majid (3 May 2021). "Hashcashed Reputation with Application in Designing Watchtowers". 2021 IEEE International Conference on Blockchain and Cryptocurrency (ICBC). IEEE. pp. 1–9. arXiv:2012.10825. doi:10.1109/icbc51069.2021.9461123. ISBN 978-1-6654-3578-9. S2CID 229340600.

elliottback.com (Global: low place; English: low place)

WP-Hashcash, a plugin for Wordpress blog software Archived 2005-10-27 at the Wayback Machine that implements a Hashcash-like facility, written in JavaScript, by Elliott Back

espacenet.com (Global: 950^th place; English: 813^th place)

worldwide.espacenet.com

US 7197639, Juels, Ari & Brainard, John Gordon, "Cryptographic countermeasures against connection depletion attacks", published 27 March 2007, issued 27 March 2007, assigned to EMC Corp

hashcash.org (Global: low place; English: low place)

"A partial hash collision based postage scheme" (Txt). Hashcash.org. Retrieved 13 October 2014.
"Hashcash – A Denial of Service Counter-Measure" (PDF). hashcash.org. 1 August 2002. Retrieved 2 January 2019.
"hashcash – hashcash anti-spam / denial of service counter-measure tool" (Txt). Hashcash.org. Retrieved 13 October 2014.
"Hashcash proof-of-work paper" (PDF). Hashcash.org. Retrieved 13 October 2014.
"Hashcash FAQ". Hashcash.org. 26 June 2003. Retrieved 11 February 2014.
"C reference implementation". hashcash.org. Retrieved 13 October 2014.

ietf.org (Global: 731^st place; English: 625^th place)

ietf.org

Linn, John. "RSA Security's Statement about IPR claimed in draft-ietf-ipsec-properties-00 and draft-jennings-sip-hashcash-00". Ietf.org. Archived from the original (Txt) on 12 January 2005. Retrieved 13 October 2014.

tools.ietf.org

"SIP Computational Puzzles". Tools.ietf.org. Retrieved 13 October 2014.

kth.se (Global: low place; English: low place)

csc.kth.se

"DoS Mitigation Using Proof Of Work" (PDF). Archived from the original (PDF) on 24 October 2015.

microsoft.com (Global: 263^rd place; English: 259^th place)

download.microsoft.com

"Email Postmark Validation Algorithm" (PDF). download.microsoft.com. Retrieved 13 October 2014.
"The Coordinated Spam Reduction Initiative: A Technology and Policy Proposal" (PDF). Archived from the original (PDF) on 21 October 2013. Retrieved 11 February 2014.

office.microsoft.com

"Discontinued features and modified functionality in Outlook 2010". Office.microsoft.com. Retrieved 13 October 2014.

ndss-symposium.org (Global: low place; English: low place)

Juels, Ari; Brainard, John Gordon (1999). "Client puzzles: A cryptographic countermeasure against connection depletion attacks" (PDF). Proceedings of the Network and Distributed System Security Symposium: NDSS '99. Reston, Virginia: Internet Society. pp. 151–165. ISBN 978-1-891562-04-4. OCLC 43452588. Archived (PDF) from the original on 15 August 2000.

semanticscholar.org (Global: 15^th place; English: 8^th place)

api.semanticscholar.org

Rahimpour, Sonbol; Khabbazian, Majid (3 May 2021). "Hashcashed Reputation with Application in Designing Watchtowers". 2021 IEEE International Conference on Blockchain and Cryptocurrency (ICBC). IEEE. pp. 1–9. arXiv:2012.10825. doi:10.1109/icbc51069.2021.9461123. ISBN 978-1-6654-3578-9. S2CID 229340600.

sourceforge.net (Global: 1,842^nd place; English: 1,520^th place)

pennypost.sourceforge.net

"Penny Post software project on SourceForge". Pennypost.sourceforge.net. Retrieved 13 October 2014.
"Penny Post: What do you mean by Postage Stamp?". Pennypost.sourceforge.net. 16 June 2008. Archived from the original on 19 February 2014. Retrieved 11 February 2014.

web.archive.org (Global: 1^st place; English: 1^st place)

"DoS Mitigation Using Proof Of Work" (PDF). Archived from the original (PDF) on 24 October 2015.
"Penny Post: What do you mean by Postage Stamp?". Pennypost.sourceforge.net. 16 June 2008. Archived from the original on 19 February 2014. Retrieved 11 February 2014.
"The Coordinated Spam Reduction Initiative: A Technology and Policy Proposal" (PDF). Archived from the original (PDF) on 21 October 2013. Retrieved 11 February 2014.
WP-Hashcash, a plugin for Wordpress blog software Archived 2005-10-27 at the Wayback Machine that implements a Hashcash-like facility, written in JavaScript, by Elliott Back
Linn, John. "RSA Security's Statement about IPR claimed in draft-ietf-ipsec-properties-00 and draft-jennings-sip-hashcash-00". Ietf.org. Archived from the original (Txt) on 12 January 2005. Retrieved 13 October 2014.
Juels, Ari; Brainard, John Gordon (1999). "Client puzzles: A cryptographic countermeasure against connection depletion attacks" (PDF). Proceedings of the Network and Distributed System Security Symposium: NDSS '99. Reston, Virginia: Internet Society. pp. 151–165. ISBN 978-1-891562-04-4. OCLC 43452588. Archived (PDF) from the original on 15 August 2000.

worldcat.org (Global: 4^th place; English: 4^th place)

search.worldcat.org

Juels, Ari; Brainard, John Gordon (1999). "Client puzzles: A cryptographic countermeasure against connection depletion attacks" (PDF). Proceedings of the Network and Distributed System Security Symposium: NDSS '99. Reston, Virginia: Internet Society. pp. 151–165. ISBN 978-1-891562-04-4. OCLC 43452588. Archived (PDF) from the original on 15 August 2000.

Hashcash (English Wikipedia)

apache.org (Global: 4,440th place; English: 3,599th place)

spamassassin.apache.org

bz.apache.org

arxiv.org (Global: 49th place; English: 31st place)

doi.org (Global: 2nd place; English: 2nd place)

doi.org

dx.doi.org

elliottback.com (Global: low place; English: low place)

espacenet.com (Global: 950th place; English: 813th place)

worldwide.espacenet.com

hashcash.org (Global: low place; English: low place)

ietf.org (Global: 731st place; English: 625th place)

ietf.org

tools.ietf.org

kth.se (Global: low place; English: low place)

csc.kth.se

microsoft.com (Global: 263rd place; English: 259th place)

download.microsoft.com

office.microsoft.com

ndss-symposium.org (Global: low place; English: low place)

semanticscholar.org (Global: 15th place; English: 8th place)

api.semanticscholar.org

sourceforge.net (Global: 1,842nd place; English: 1,520th place)

pennypost.sourceforge.net

web.archive.org (Global: 1st place; English: 1st place)

worldcat.org (Global: 4th place; English: 4th place)

search.worldcat.org

apache.org (Global: 4,440^th place; English: 3,599^th place)

arxiv.org (Global: 49^th place; English: 31^st place)

doi.org (Global: 2^nd place; English: 2^nd place)

espacenet.com (Global: 950^th place; English: 813^th place)

ietf.org (Global: 731^st place; English: 625^th place)

microsoft.com (Global: 263^rd place; English: 259^th place)

semanticscholar.org (Global: 15^th place; English: 8^th place)

sourceforge.net (Global: 1,842^nd place; English: 1,520^th place)

web.archive.org (Global: 1^st place; English: 1^st place)

worldcat.org (Global: 4^th place; English: 4^th place)