The Real Power of Blockchain – Decentralized Computing

With the blockchain hype at its peak (according to Gartner) there is debate about the real power behind blockchains. Especially as blockchain POCs are increasingly becoming glorified enterprise systems or at least solving problems that other, older and faster crypto and database tech could solve. Some place the power on the hash chain yet that … Read more

Building a Private Blockchain

Today we finally got the home version of the Ethereum testnet up and running on a network of computers each running their own network of virtual machines. This way it is very easy to create a lot of nodes for the private blockchain testnet. Most of the VMs are very light linux distributions like Lubuntu … Read more

The Great Blockchain Hash Arbitrage

There is a lot of talk in the media about the popularity of various digital currencies and tokens. Typically the arguments related the recent cyber attacks, changes in regulatory positions, press releases by startups, growth in venture investments or a completion of a proof of concept by a corporation. Rarely are predictions based on economics … Read more

The need for a blockchain security framework

Since recent hacks question blockchain security – it is a good idea to discuss what blockchain security actually is. This points beyond the normal computer security issues for the server running the blockchain program or the desktop computer running the blockchain wallet. There are hundreds of altcoins and other blockchains so let’s use Bitcoin and Ethereum … Read more

You can live off Digital Currencies at least in the US and the EU

We have tested several services that claim to allow you to live completely on the bitcoin (and some on Ethereum) blockchains. We determined that you need 6 things to be in place for digital currency based living. To be clear there is no such thing as end-to-end digital interactions as long as some actors in the … Read more

Notarizing now on dual blockchains

For well over a year now one blockchain application I use consistently beyond Bitcoin are the various notary services. It is extremely convenient and very useful to notarize presentations, contracts, proposals and other documents on the blockchain. Years from now it will be routine to accept digital hashes like this as legal proof as they … Read more

The Other Hard Fork between Currency and Not

With the increasing enthusiasm various industries have for blockchains there is an emerging split between currency and non-currency applications or put another way, consumer and enterprise use cases. People looking to buy a coffee or some electronics will still have to rely on Bitcoin (I’ve yet to find many Ethereum merchants). The business blockchains are … Read more

Supply Chain Everywhere

In the last couple of weeks our pilot discussions moved to supply chains. The bank consortiums are turning the financial use cases further away from breakthrough cost reductions through disintermediation to moderate efficiencies and better security through a better payment rail. It is possible that the future settlement systems will be more secure but unlikely … Read more


For those of us shareholders in the DAO, I’m sure this will be a fun ride.. Guess which way we’re voting on the hard fork of the DAO… I do agree though that app security on the blockchain and off is not mature yet. Not perimeter security or authentication (we have that) but secure design. … Read more

Supply Chain Blockchains

Washington University and BTC Media hosted the first blockchain forum dedicated to supply chain logistics and finance. I found the use cases and applications more practical than the typical fintech blockchain events. Key takeaways from the forum: Unlike banking, supply chain is less burdened with regulatory complexities and the fear of disintermediation by the incumbents (like … Read more