Talks and presentations

See a map of all the places I've given a talk!

Privacy-Enhancing Consortium Blockchain

June 04, 2018

Invited Talk, Second ACM Workshop on Blockchains, Cryptocurrencies and Contracts (BCC'18), Incheon, Korea

Blockchain provides an immutable, global transaction history in distributed system. All transactions can be seen by all of the nodes on the network. However, it may not be desirable in business use cases that require strong privacy. In public blockchain, several cryptographic techniques are used to provide anonymity of users and confidentiality of transaction amount (such as linkable ring signature in Monero, and zk-SNARK in ZCash). However, they are not efficient enough for systems with high throughput. Therefore, we propose and implement some new privacy-enhancing techniques which can be used in consortium blockchain.

Blockchain: How crypto meets the industry?

December 13, 2017

Invited Talk, 13th International Conference on Information Security Practice and Experience (ISPEC), Melbourne, Australia

Blockchain, the core component of Bitcoin, has been extremely popular among the finance, supply chain and many other industries in the last few years. Many governments and companies are experimenting blockchain with proof of concepts. The growing interest in blockchain drives a lot of new security research areas, including security model and analysis of blockchain, consensus algorithms built from cryptographic primitives, privacy enhancing technologies in blockchain (e.g. linkable ring signatures, zk-SNARKs), etc. There are still some gap between the research community and the blockchain applications. In this talk, we will introduce some challenges we faced, such as implementation difficulties, research problems and application level challenges. We present our views and some solutions on these issues.