Episode 155: Testing PoW Consensus Algorithm Security with Ren Zhang from Nervos

In this week’s episode, we revisit the topic of consensus algorithms with Ren Zhang, a researchers at Nervos and previously at imec-COSIC (KU Leuven). We chat about an earlier work he did on evaluating PoW consensus protocols security and explore his more recent work on NC-Max – a consensus protocol that breaks the throughput limit and enables the full utilization of the nodes’ bandwidth in confirming transactions

Here are a few of the links we mention in the interview:

More on Nervos:
For the UTXO Programming Model of Nervos, the best starting point is Ren’s colleague Xuejie Xiao's blog.
An explanation of Nervos DAO
An introduction of the Virtual Machine and smart contract support


Thanks to our sponsor Least Authority.

Least Authority is a security consulting company known for their dedication to pushing the limits on how to build privacy-respecting solutions. They are a team of security researchers, open source developers, privacy advocates, cryptographers who specialize in security audits, design specification reviews, and security-by-design.

Given that privacy is at the core of their work and mission, least authority recognizes the importance of privacy in DeFi and other decentralizing technologies and the role it plays in preserving balance of power. Least Authority is supporting this through a growing list of security reviews, building distributed systems and regular contributions to open source software projects.

To find out about their work, visit leastauthority.com to check out their security audit reports.

And get in touch at contactus@leastauthority.com if you want to talk about the security of your DeFi project.


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Previous Episodes

Episode 346: ZK in Review: Decoding 2024 & Predicting 2025

This week, Anna catches up with cohosts, Tarun, Nico and Guillermo to do a look back at the zk research and applications that came out in 2024. They go on to discuss the challenges facing the ecosystem. And they wrap with a brief look forward, covering what to expect in ZK in 2025.

This will be the last ep of 2024, thank you for joining us this year!

Episode 345: Latest ZK Research with Dan Boneh

In this week’s episode, Anna catches up with Dan Boneh, Professor of Computer Science and Electrical Engineering, Stanford University. They discuss the focus of his research today, covering new ZK research problems and themes. This includes work on lattice-based SNARKs, ZK for content provenance, ZK in the FHE context, updates on ZK in ML and more!

Episode 344: ZK Events 2024 Recap

This week, Anna and Nico take a look back at some of the ZK Events produced in 2024 by the ZK Podcast, ZK Hack and other adjacent projects. Starting with the live ZK Jargon Decoder hosted in January and spanning the 10 months since, Anna and Nico share behind-the-scenes anecdotes, highlight key talks from the events and share some insight into how the programs for the zkSummit events are created. They wrapped with a summary of some of the themes in ZK that got them talking this year and are tracking going forward.

Don’t forget, this is the last episode of ZK Podcast before we take a pause in weekly shows for the rest of 2024 – but don’t worry we will be back!

Episode 343: Mastering MPC & Memes with Mikerah

This week Anna chats with Mikerah Quintyne-Collins from HashCloak and Stoffel Labs. They discuss how Mikerah got her start in the crypto space and then dive into the work she did at ChainSafe and eventually at HashCloak. They cover Mikerah’s work on privacy preserving tech like ZK, TEE and MPC and learn about what drives her tweet game and the wisdom she has picked up over the years as a technical founder, driven by curiosity… and memes.

Bonus: ZK Whiteboard Sessions Season 2 and a ZK Pod Pause!

Just sharing 2 updates:
1) The ZK Whiteboard sessions are BACK with a 2nd season! These videos will be released every 2 weeks for the next 3 months.
2) The Zero Knowledge Podcast will take a pause on the weekly cadence of the show starting Oct 16th until the end of 2024.

Episode 342: Catch up with Zac and Ariel

This week Anna catches up with Zac Williamson & Ariel Gabizon from Aztec. They cover what each has been working on over the last year, Zac shared updates about the development of Aztec and the finalization of their underlying ZK system: MegaPlonk. Ariel discussed his latest research on IVC with his publications of the ProtoGalaxy and Stackproofs works and how properties of this systems brought him and Zac to start working together again.

Episode 341: coSNARKs with Ais and Lukas from TACEO

This week Anna and Nico chat with Lukas Helminger and Ais Connolly from TACEO. They discuss Lukas & Ais’ early work in cryptography and privacy preserving technologies, the founding of TACEO and their recent work on coSNARKs – or Collaborative SNARKs – that combine MPC and ZK. They explore how these coSNARKs are created, their coCircom language, the characteristics of these systems as well as how they can be applied in the real world.

Episode 340: Is Cosmos Dead? A critical look with Zaki Manian

This week Anna and Zaki Manian dive into the Cosmos ecosystem and ask the question: is Cosmos Dead? They explore key events, teams and players who worked on Cosmos during different eras before teasing out the strengths and structural flaws that made the project what it is today. The conversation wraps with a discussion around new initiatives aimed at reviving the ecosystem and aligning factions in Cosmos together towards a central goal.

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