Biscotti: A Blockchain System for Private and Secure Federated Learning


Ivan Beschastnikh, Muhammad Shayan, Clement Fung, Chris J.M Yoon

Date of Publication


Federated Learning is the current state of the art in supporting secure multi-party machine learning (ML): data is maintained on the owner's device and the updates to the model are aggregated through a secure protocol. However, this process assumes a trusted centralized infrastructure for coordination, and clients must trust that the central service does not use the byproducts of client data. In addition to this, a group of malicious clients could also harm the performance of the model by carrying out a poisoning attack.
As a response, we propose Biscotti: a fully decentralized peer to peer (P2P) approach to multi-party ML, which uses blockchain and cryptographic primitives to coordinate a privacy-preserving ML process between peering clients. Our evaluation demonstrates that Biscotti is scalable, fault tolerant, and defends against known attacks. For example, Biscotti is able to protect the privacy of an individual client's update and the performance of the global model at scale when 30% of adversaries are trying to poison the model.
The implementation can be found at: this https URL

External Link

Read the Research Paper

  • Conference Paper

First Nations land acknowledegement

We acknowledge that the UBC Point Grey campus is situated on the traditional, ancestral, and unceded territory of the xʷməθkʷəy̓əm.

UBC Crest The official logo of the University of British Columbia. Urgent Message An exclamation mark in a speech bubble. Caret An arrowhead indicating direction. Arrow An arrow indicating direction. Arrow in Circle An arrow indicating direction. Arrow in Circle An arrow indicating direction. Chats Two speech clouds. Facebook The logo for the Facebook social media service. Information The letter 'i' in a circle. Instagram The logo for the Instagram social media service. External Link An arrow entering a square. Linkedin The logo for the LinkedIn social media service. Location Pin A map location pin. Mail An envelope. Menu Three horizontal lines indicating a menu. Minus A minus sign. Telephone An antique telephone. Plus A plus symbol indicating more or the ability to add. Search A magnifying glass. Twitter The logo for the Twitter social media service. Youtube The logo for the YouTube video sharing service.