School of Cybersecurity & Privacy Recruiting Seminar

Time: 
Tuesday, February 8, 2022 - 12:08pm to 1:00pm
Location: 
Coda Bldg. 9th Floor Atrium

The School of Cybersecurity & Privacy is welcoming Benedikt Bünz for a seminar titled, Improving the Privacy, Scalability, and Ecological Impact of Blockchains. Bünz is a Ph.D. student at Stanford University in the applied cryptography lab with Dan Boneh. His work focuses on the science of blockchains.

The faculty recruiting seminar is scheduled for Feb. 8 at 12 p.m. in the 9th floor atrium of the Coda Building.

Abstract: Blockchains are an exciting area of research that touches on many areas of Computer Science and beyond. This technology has the potential to enable a fast, cheap, and private financial system based on distributed consensus and cryptography, instead of trusted parties. Despite this potential, the reality still shows severe limitations of blockchains: (i) transactions can cost hundreds of dollars and take minutes to confirm, (ii) some blockchains offer little privacy, and (iii) proof-of-work consensus consumes too much energy. In this talk, I will discuss powerful techniques that follow a prover paradigm and can mitigate these limitations. The first technique, called Bulletproofs, is a general-purpose zero-knowledge proof system that is specifically designed to enable confidential blockchain transactions. Bulletproofs requires minimal trust assumptions and gives the shortest zero-knowledge proofs without a trusted setup. The system is widely deployed and powers tens of thousands of private blockchain transactions per day. The second technique, called inner pairing products, is a way to aggregate many zero-knowledge proofs into a single short proof. This can significantly reduce on-chain data, leading to a significant increase in transactions per second that the chain can process. The third technique is a new concept called a verifiable delay function (VDF) that is vital for permission-less and eco-friendly consensus. VDFs are already deployed in Filecoin and Chia, and are planned for Ethereum 2.0, the upcoming upgrade to Ethereum.

More Information

Kenya Payton, Assistant to the School Chair
mailto:kpayton6@gatech.edu