Our Research Publications About Crypto Currencies and Their Security:

1. Nicolas T. Courtois and Rebekah Mercer:
   Stealth Address and Key Management Techniques in Blockchain Systems;
   in proceedings of ICISSP 2017, 19-21 Feb 2017, Porto, Portugal.
2. Nicolas T. Courtois:
   Features or Bugs: The Seven Sins of Current Bitcoin,
   In Banking Beyond Banks and Money,
   pp. 97-120, 1 September 2016, Springer.
   Available here.
   ISBN: 978-3-319-42446-0 (Print) 978-3-319-42448-4 (Online)
3. 
   Nicolas Courtois, Guangyan Song, Ryan Castellucci:
   Speed Optimizations in Bitcoin Key Recovery Attacks,
   In CECC 2016, post-proceedings of Tatracrypt 2016 conference to appear,
   earlier preprint available here (8 February 2016),  Some basic slides can be found here.

4. Nicolas T. Courtois, Pinar Emirdag and Filippo Valsorda:
   Private Key Recovery Combination Attacks: On Extreme Fragility of Popular Bitcoin Key Management, Wallet and Cold Storage Solutions in Presence of Poor RNG Events,
   16 October 2014, preprint available here.
5. Nicolas Courtois:
   On The Longest Chain Rule and Programmed Self-Destruction of Crypto Currencies.
   Here is a video about the Longest Chain Rule and 51% attacks.
6. Nicolas T. Courtois, Pinar Emirdag and Daniel A. Nagy:
   Could Bitcoin Transactions Be 100x Faster?,
   appears in proceedings of
   SECRYPT 2014, 28-30 August 2014, Vienna, Austria.
   An extended version in preparation.
   Her is our poster about improving bitcoin speed
   presented at SECRYPT 2014.
7. Nicolas T. Courtois, Pinar Emirdag and Zhouyixing Wang:
   On Detection of Bitcoin Mining Redirection Attacks, In ICISSP 2015, 1st International Conference on Information Systems Security and Privacy, 9-11 Feb 2015, Angers, France.   Here is the paper and here are slides presented.
8. Nicolas Courtois, Marek Grajek, Rahul Naik:
   Optimizing SHA256 in Bitcoin Mining.
   In proceedings of CSS 2014, Springer, 2014.
   Available here. And here are our detailed slides on bitcoin mining.
9. Nicolas Courtois, Marek Grajek, Rahul Naik:
   The Unreasonable Fundamental Incertitudes Behind Bitcoin Mining, 31 October 2013. Available here.  Older slides of May 2014. Later extended slides on bitcoin mining.
10. Nicolas Courtois, Lear Bahack:
    On Subversive Miner Strategies and Block Withholding Attack in Bitcoin Digital Currency.
    
11. Nicolas Courtois, Marek Grajek, Rahul Naik:
    The Unreasonable Fundamental Incertitudes Behind Bitcoin Mining.