As blockchain technologies mature, new protocol specifications are emerging, which take unique approaches to software design and how consensus is achieved. We have talked about Multchain and OpenChain in the past, but Tendermint promises to be a viable solution for many permissioned blockchain use cases. It’s design is modular, meaning that the application layer (smart contract) and the consensus layer are completely independent. This provides added flexibility and allows for business logic to b...
Jan 11, 2016•1 hr 19 min•Ep. 113
Permissionable blockchains have gained much attention from enterprise this past year, and specifically, the traditional fiance and FinTech sectors. As new protocols emerge and the technology is matures, it is becoming apparent they are simply a new class of database, one which integrates business logic (smart contracts) and a consensus layer (PoS, PoW, etc). is the CEO of Eris Industries, a company which specializes in building permissioned blockchain systems for enterprise. Their aim is to deli...
Jan 04, 2016•1 hr 18 min•Ep. 112
Andrew Miller is a computer science PhD student at the University of Maryland who focuses on cryptocurrency. Having gotten involved in Bitcoin in 2011 and focused on cryptocurrencies early in his research work, he is one of the most prolific researchers in the field. Our discussion mainly focused on security aspects of Ethereum including their gas model, Proof-of-Work algorithm and plans to switch to Proof-of-Stake. Topics covered in this episode: How he got involved in doing research on Bitcoin...
Dec 28, 2015•1 hr 3 min•Ep. 111
With over 600,000 views, James D’Angelo’s educational videos at the World Bitcoin Network are among the most popular resources on Bitcoin. Besides his excellent technical explanation, he has also been vocal about the dangers of the increasing centralization of mining. James joined us to talk about his background as a rapper, the World Bitcoin Network, his proposal to use the Bitcoin blockchain to fight climate change and his argument that keeping Bitcoin decentralized would require sacrificing t...
Dec 21, 2015•1 hr 19 min•Ep. 110
Identity is probably one of the most important constructs in our society. In our modern world, protecting one’s identity has become complex, as we no longer rely solely on governments to prove who we are. In addition, most identity sources can be easily compromised. Credit cards and social security numbers weren’t developed with the Internet in mind, and other identifiers such as logins and passwords aren’t well suited truly secure authentication and authorisation. We’re joined by Tim Pastoor, F...
Dec 14, 2015•1 hr 4 min•Ep. 109
The Bitcoin and blockchain industry has been through a lot this year. While the Bitcoin price has experienced relative stability, perhaps indicating slow growth, the space has grown into a rich and diverse ecosystem of startups and open technologies. Through inspiring proof-of-concepts and exciting use cases, blockchain technologies have gained legitimacy as a viable technology to improve transparency, reduce costs and optimise processes, to name a few of it’s benefits. In this episode, all thre...
Dec 08, 2015•1 hr 20 min•Ep. 108
Gideon Greenspan, a computer scientist and CEO/Founder of the Israeli startup Coin Sciences, joined us for a discussion of their private blockchain platform MultiChain. Besides diving into the popular question of what’s the point of a private blockchain, we covered his earlier colored coins implementation as well as his view that blockchains are best understood as a novel database paradigm. Topics covered in this episode: How Gideon got involved in the blockchain space Their colored coins implem...
Nov 30, 2015•1 hr 3 min•Ep. 107
Christian Decker is a PhD student at ETH Zurich, where he is currently finishing up the world’s first PhD thesis entirely about Bitcoin. The computer scientist has been part of the Bitcoin community since 2009 and just recently turned off his last miner after 6.5 years! We talked about the current scalability debate and what his research indicated what blocksize could reasonably be handled today. We also discussed his proposal for Duplex Micropayment Channels. Like the Lightning Network, Duplex ...
Nov 23, 2015•1 hr 8 min•Ep. 106
With Proof-of-Stake (PoS) a blockchain is secured not by spending an external resource such as electricity but by using value internal to the chain itself. The promise of higher security at a lower cost is what also drives Ethereum to plan a move away from Proof-of-Work to PoS in the future. Ethereum researcher Vlad Zamfir, who leads their effort in the complex search for the optimal PoS consensus system joined us for an in-depth discussion of the challenges of PoS, the approach Casper is taking...
Nov 16, 2015•1 hr 12 min•Ep. 105
Businesses with the alleged potential to become the next Google are plentiful in Bitcoin-land, but finding actual commercial success is a lot harder. The best example of a commercial success is gift card company Gyft that became known as the first place to give access to a wide range of merchants for bitcoin holders and later achieved the largest exit so far in the crypto space in an acquisition by payments company First Data. Gyft CTO joined us to talk about how he got involved in FinTech, what...
Nov 09, 2015•1 hr 6 min•Ep. 104
One of the concerns confronting the Bitcoin community is that of scaling the transaction throughput rate: How do we go from the current rate of approx. 5 transactions per second to a thousand times that? In this episode, we talk to Emin Gun Sirer and Ittay Eyal from Cornell University regarding Bitcoin NG; a next generation Bitcoin blockchain design that addresses some protocol based limitations preventing Bitcoin from increasing transaction throughput. Their proposal also enables fast (initial)...
Nov 02, 2015•1 hr 9 min•Ep. 103
Among the dividing themes in the Bitcoin space is the idea of public versus private blockchains. While some argue that private and permissioned blockchains can offer better scalability and lower latency for enterprises, others insist the Bitcoin blockchain will offer the best level of security and robustness longterm. Recently, projects have emerged that propose the best of both worlds by leveraging both off-chain and on-chain transactions. This is the idea behind Openchain, an “open source dist...
Oct 26, 2015•1 hr 14 min•Ep. 102
A brilliant fact about crypto-economic blockchains is that they enable the construction of naming systems that transcend limits imposed by Zooko’s triangle. Traditional naming systems such as human names, Domain Name System (DNS) and Facebook profile names are subject to Zooko’s triangle and cannot be secure, human memorable and decentralised at once. For instance human names such as Meher Roy are human-memorable and decentralised but not secure (nothing prevents hundreds of people being called ...
Oct 19, 2015•1 hr 26 min•Ep. 101
We’ve made it to episode 100! Our guest for our celebratory episode is Juan Benet, inventor of the Inter-Planetary File System and founder of Protocol Labs. IPFS is a distributed file system that seeks to connect all computing devices with the same system of files. The possibilities for IPFS could range from distributed cloud hosting to websites without central servers to even replacing HTTP. It’s a project as audacious as any we’ve had on the podcast and Juan did an outstanding job explaining t...
Oct 12, 2015•1 hr 37 min•Ep. 100
One of the key innovations of Bitcoin is the ability to easily implement payment channels. A number of use cases have been discussed or demonstrated, among which is the idea of pay-per-use. This is particularly useful when charging for things like WiFi or streaming video by the second. With this in mind, one could imagine a line of communication between two peers, where data flows in one direction and payments flow in the other. This is the idea behind Streamium, a free and open-source service w...
Oct 05, 2015•1 hr 11 min•Ep. 99
When invented the concept of prediction markets almost thirty years ago, he felt he had stumbled on a concept with huge implications. By allowing people to bet on the likelihood of future events, prediction markets promise to allow better forecasts and better decision making. Research into the area has been vibrant, culminating in Hanson’s concept of Futarchy: A prediction-market based governance system. At the same time, the real-world applications have been few and far. Hanson, an associate pr...
Sep 28, 2015•1 hr 19 min•Ep. 98
Prediction markets are considered one of the most promising applications of blockchain technology. Although the concept and some early implementations have existed for years, decentralized prediction markets present a number of advantages to their centralized counterparts. joins us to discuss Truthcoin, a “Peer-to-Peer Oracle Protocol which absorbs accurate data into a blockchain so that Bitcoin-users can speculate in Prediction Markets”. We dive deep to explore the advantages of decentralized p...
Sep 21, 2015•1 hr 18 min•Ep. 97
It is often said that technology is neutral. It’s certainly commonplace for Bitcoin to be thought of as such. In reality, technologies may be characterized as an embodiment of human intention, and therefore, cannot be considered as culturally or politically neutral. At least, this is the opinion of our guest, . A research scientist at MIT Media Lab and CEO of ID3, a nonprofit which aims to deploy a new generation of trusted digital institutions, John has spent the last seven decades researching ...
Sep 14, 2015•1 hr 9 min•Ep. 96
As the debate about forks, the blocksize and decision making in Bitcoin continues, we are joined by Adam Back. Adam is best known for his invention hash-cash which became one of the fundamental building blocks of Bitcoin. He is also the inventor of the sidechains concept and founder and president of Blockstream, the single biggest employer of Bitcoin core developers. With Adam we talked about the different blocksize proposals and how a decentralized cryptocurrency should be governed in general. ...
Sep 07, 2015•1 hr 16 min•Ep. 95
As the debate about the blocksize continues to roar through the Bitcoin community, Gavin Andresen joins us to take a step back and ask the big questions: How should these decisions be made in the first place? What does the governance of Bitcoin look like now and what do we want it to look like in the future? In a challenging time for Bitcoin, it’s a critical discussion to have with the Chief Scientist of the Bitcoin Foundation and successor of Satoshi. We cover everything from the current blocks...
Aug 31, 2015•1 hr 19 min•Ep. 94
Ever since the financial system collapsed in 2007, the call for alternatives has grown louder. Bitcoin itself can be seen as such an alternative. Simon Dixon’s search for a way to put capitalism on a sounder financial footing began before Bitcoin with a focus on equity crowdfunding. Since then he has built Bank to the Future into an innovative crowdfunding business that takes an aggressive contrarian stance. He has also launched an investment fund focused on cryptocurrencies together with Max Ke...
Aug 24, 2015•1 hr 3 min•Ep. 93
In a long-overdue episode, we finally had the chance to dive into one of the most known but poorly understood cryptocurrency/blockchain project: Ripple. Reviled by many in the Bitcoin space, we put aside any prejudices and sat down for a fascinating conversation with Ripple Labs CTO Stefan Thomas. We talked about his early days in the Bitcoin space, how Ripple came about, what the Ripple network looks like today and how its consensus protocol works. Topics covered in this episode: ‘ early experi...
Aug 17, 2015•1 hr 5 min•Ep. 92
Close to two years after the initial whitepaper, the revolutionary Ethereum network has finally launched. The decentralized smart contract platform is, without a doubt, the most exciting cryptocurrency project since Bitcoin. The versatile platform with its turing-complete scripting language aspires to power the distributed applications of the future. Ethereum Founder Vitalik Buterin joined us for the second time to discuss the Frontier Launch, future plans for scalability, governance and the roa...
Aug 10, 2015•1 hr 17 min•Ep. 91
Bitcoin mining and the intricate game theory that surround it is a topic that we’ve visited many times. Difficult to grasp in its complexity, it is these dynamics that determine the security of Bitcoin in the short and in the longer term. This time we were joined by none other than Dave Hudson. He is the author of the leading mining blog hashingit.com, VP of Software at PeerNova and had a long career in chip manufacturing including at Qualcomm. We talked about dynamics in the mining market, secu...
Aug 03, 2015•1 hr 7 min•Ep. 90
Amidst all the discussion of alternative uses of blockchains, it is often forgotten that the very first fork of Bitcoin, Namecoin, pursued a daring vision for a decentralized, censorship-resistant internet. Greg Slepak, co-founder of the okTurtles Foundation joined us for an interesting discussion of DNS, Namecoin and how blockchains can be used to decentralize the internet. Topics covered in this episode: What DNS is and the role it plays in the architecture of the internet What man-in-the-midd...
Jul 27, 2015•1 hr 1 min•Ep. 89
In this episode, we revisited the perennial topic of digital currency regulation with Siân Jones, our regulatory correspondent and founder of the regulation-focused virtual currency consultancy COINSULT. With the final version of the BitLicense, what may turn out to be the most influential document for digital currency regulation, is now out. Besides diving into many different aspects of the onerous BitLicense, we talked about California’s coming rules, how Bitcoin startups will be affected and ...
Jul 20, 2015•1 hr 12 min•Ep. 88
Solving the pain points of online payments was the applications that garnered the most attention in Bitcoin’s early days. In recent times, as consumer adoption of Bitcoin payments has been underwhelming much of that attention has shifted elsewhere. Nevertheless, companies keep working hard on making the vision of a universal, global payment system a reality. Among those companies, one stands out as the top contender to compete with existing payment systems: Bitnet. Funded with a heavy warchest a...
Jul 13, 2015•1 hr 12 min•Ep. 87
Peter Thiel argued in his book ‘Zero to One’ that the way to build a great and highly profitable company is to build a monopoly. But with decentralized technologies, there is a real question whether these monopolies can be built or whether the monopolies will end up being publicly owned goods (like Bitcoin) that can’t be monetized directly. William Mougayar, who is an experienced tech executive and angel investor, has been writing extensively about these issues and was one of the investors in OB...
Jul 06, 2015•1 hr 11 min•Ep. 86
Revolutionary progress doesn’t happen without lots of work and in the case of Bitcoin that requires many different startups building technology. Few have contributed to this as much as Silicon Valley based startup accelerator Boost VC, which has been focusing on Bitcoin and cryptocurrency startups since 2013. Focusing exclusively on Bitcoin for an extended time, they’ve invested in companies such as Blockcypher, Coinprism, Coinjar, Mirror, Snapcard, Zapchain and many others. Boost VC Founder Ada...
Jun 29, 2015•59 min•Ep. 85
One topic that is guaranteed to cause heated discussion among cryptocurrency enthusiasts is the idea that blockchains can be controlled by known validators and function without an underlying cryptocurrency. Some think this is a non-sensical idea fabricated by those spineless enough to want to appease regulators and but clueless enough to miss the whole point of cryptocurrencies. But others believe that Bitcoin is unsuited for a lof of ‘Bitcoin 2.0’ applications and that permissioned ledgers have...
Jun 22, 2015•1 hr 11 min•Ep. 84
