Nummatus: A Privacy Preserving Proof of Reserves Protocol for Quisquis

  • Arijit Dutta
  • Arnab Jana
  • Saravanan VijayakumaranEmail author
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11898)


Quisquis is a recently proposed design for a privacy-focused cryptocurrency. We present Nummatus, a privacy preserving proof of reserves protocol for Quisquis. Nummatus enables exchanges to create a Pedersen commitment to the amount of Quisquis coins they own, without revealing the exact accounts they own. These commitments can be combined with a commitment to the total liabilities of an exchange to generate a proof of solvency. The Nummatus protocol also facilitates detection of account sharing collusion between exchanges. Our simulations show that the cost of using Nummatus instead of a non-private proof of reserves protocol is not prohibitive.


Proof of reserves Quisquis Cryptocurrency Privacy in blockchain 


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Arijit Dutta
    • 1
  • Arnab Jana
    • 2
  • Saravanan Vijayakumaran
    • 1
    Email author
  1. 1.Department of Electrical EngineeringIndian Institute of Technology BombayMumbaiIndia
  2. 2.Department of Computer Science and EngineeringIndian Institute of Technology BombayMumbaiIndia

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