Those who ignore history are doomed to repeat it! Study the largest list anywhere on the internet of hacks, frauds, and scams that involve cryptocurrency exchanges!

The list below is limited to hacks, scams, and frauds involving 51% attacks. Click here to view all hacks, scams, and frauds.

Or, enter a search term to narrow the list:

Note that while new cases are continuously added every day, there is a long backlog and newer cases may not have been added yet. Want to beef up your security/fraud understanding and contribute back to the blockchain community by helping compile cases? Please reach out to info@quadrigainitiative.com.

2021

Aug 2021 - BSV 51% Attack Repelled - $0k (Global)   Jul 2021 - Bitmart BSV 51% Attack - $Unknown (Cayman Islands)   Jun 2021 - Haven Protocol Triple Attack - $11.6m (Global)   May 2021 - CheapETH 51% Attack Demonstration - $0k (Global)   Feb 2021 - Verge Block Reorganization Attempt - $0k (Global)   Jan 2021 - Binance Firo (ZCoin) 51% Attack - $4.381m (Global) Jan 2021 - Indodax Firo (ZCoin) 51% Attack - $400k (Global)

2020

Nov 2020 - Grin Token 51% Attack - $Unknown (Global)   Aug 2020 - Ethereum Classic Third 51% Attack - $5m (Global) Aug 2020 - Bitfinex/Ethereum Classic Second 51% Attack - $3.2m (Unknown)   Jul 2020 - OkEx Ethereum Classic 51% Attack - $5.6m (Malta) Jul 2020 - Bitcoin Gold 51% Attempt Foiled - $0k (Global)   Jan 2020 - Binance/Bitcoin Gold Double Spend Hack - $72k (Malta)

2019

May 2019 - Bitcoin Cash Two-Block Double Spend - $1.3m (Global)   Jan 2019 - Gate.io Ethereum Classic 51% Attack - $271k (Cayman Islands) Jan 2019 - Bitrue Ethereum Classic 51% Attack - $14k (Taiwan/Singapore)

2018

Dec 2018 - Vertcoin 51% Attack - $100k (Global)   May 2018 - Verge Second 51% Attack - $1.75m (Global) May 2018 - Monacoin 51% Attack - $90k (Japan) May 2018 - Binance Bitcoin Gold 51% Attack - $Unknown (Cayman Islands) May 2018 - Bithumb Bitcoin Gold 51% Attack - $Unknown (South Korea) May 2018 - Bitinka Bitcoin Gold 51% Attack - $Unknown (Peru) May 2018 - Bitfinex Bitcoin Gold 51% Attack - $Unknown (Hong Kong) May 2018 - Bittrex Bitcoin Gold Double-Spend - $255k+ (Liechtenstein)   Apr 2018 - Verge 51% Attack - $1.074m (Global) Apr 2018 - Electroneum 51% Attack - $0k (Global)

2014

Jul 2014 - MintPal Vericoin Hack/Rollback - $2m (United Kingdom)

2013

Jun 2013 - Feathercoin 51% Attack - $Unknown (Global)

If you know of a cryptocurrency exchange hack, scam, or fraud event which is not on our list, or see any information that is out of date or needing update, please send us an email or join the discussion!

 For questions or enquiries, email info@quadrigainitiative.com.

Get Social

  • email
  • reddit
  • telegram
  • Twitter

© 2021 Quadriga Initiative. Your use of this site/service accepts the Terms of Use and Privacy Policy. This site is not associated with Ernst & Young, Miller Thompson, or the Official Committee of Affected Users. Hosted in Canada by HosterBox.