Exploring the World of Blockchain Transactions


Those of you who have been following my recent posts about digital currencies may remember my recent discussion with Alex Tapscott, founder and CEO of Northwest Passage Ventures. He’s the co-author along with his dad, the business theorist Don Tapscott of the best selling book ‘The Trust Protocol: How Blockchain Technology Will Change Money, Business and the World. ” In my last post, we delved a little into the topic of blockchains, those public ledgers that allow digital currencies like bitcoin and others to be sent to others as a form of payment. Here, Alex discusses the different forms that a blockchain can take.

“There are lots of different ways to make a blockchain, with some being public and some private, and a lot of times people don’t really know what that means,” Alex said. “Basically a public blockchain is simply one that is open and permissionless, where anybody can access it regardless of where they are or who they are.

“And typically public blockchains have a native token, a cryptocurrency like bitcoin or in the case of Ethereum—a blockchain-based computing platform that can execute peer-to-peer contracts—a cryptocurrency called ether. Public blockchains have a lot of positive attributes. Because they’re open, they have many different participants, and the more participants there are, the more transaction validity you get.”

Alex acknowledged fears that cryptocurrencies might be hacked, with bitcoins or other currencies actually stolen, but said public blockchains help mitigate the risk.

“The more different people you have, the more distributed it is, which generally speaking reduces the chance of attack, because you have to attack many computers rather than one computer. Also, because you’ve got lots of different computers, there’s more energy and more computing power going into this blockchain, which makes it more secure for the most part.

“Now, there is a flipside to public blockchains which makes it somewhat limited, at least today. Transactions in a public blockchain have to be broadcast across the whole network. This means that the number of transactions that the blockchain can handle is limited because, remember, it does requires a lot of computing power and a lot of energy. So the question of scalability is one that’s still unresolved in public blockchains.”

By contrast, Alex noted that private blockchains are made up of participants who have permissioned access. And with fewer participants a private blockchain can manage a higher transaction volume, he said.

“And it can manage more types of transactions, too, because the rules are set by the participants, and they can change the rules to meet different types of assets. Everyone trusts each other somewhat, and can trust that they each have the necessary computing resources to manage the blockchain. That means it’s unlikely that someone won’t have the ability to participate fully.

“Also, because private blockchains are permissioned, they are, generally speaking, more palatable to regulators, because you could grant permission to different parties in a transaction. One of those parties could be an auditor like PricewaterhouseCoopers, for example. One of them could also be a regulator who could look in to see the metadata and validate what’s happening.”

In future posts, we’ll delve into a lot more about the future of cryptocurrencies, including setting up private blockchains, regulatory aspects, security and more. Watch for it!

Written by Paul Dunay
Paul Dunay is an award-winning B2B marketing expert with more than 20 years’ success in generating demand and creating awareness for leading technology, consumer products, financial services and professional services organizations. Paul is the global vice president of marketing for Maxymiser a leading web optimization firm, and author of four “Dummies” books: Facebook Marketing for Dummies (Wiley 2009), Social Media and the Contact Center for Dummies (Wiley Custom Publishing 2010), Facebook Advertising for Dummies (Wiley 2010) and Facebook Marketing for Dummies 2nd Edition (Wiley 2011). His unique approach to marketing has led to recognition of Paul as a BtoB Magazine Top 25 B2B Marketer of the Year for 2010 and 2009 and winner of the DemandGen Award for Utilizing Marketing Automation to Fuel Corporate Growth in 2008. He is also a finalist for the last six years in a row in the Marketing Excellence Awards competition of the Information Technology Services Marketing Association (ITSMA), and is a 2010 and 2005 gold award winner in Driving Demand. Buzz Marketing for Technology, Paul’s blog, has been recognized as a Top 20 Marketing Blog for 2009 and 2008, a Top Blog to Watch for 2009 and 2008, and an Advertising Age Power 150 blog in the “Daily Ranking of Marketing Blogs.” Paul has shared his marketing thought leadership as a featured speaker for the American Marketing Association, BtoB Magazine, CMO Club, MarketingProfs, Marketing Sherpa, Marketing Executives Networking Group (MENG), and ITSMA. He has appeared on Fox News, and his articles have been featured in BusinessWeek, The New York Times, BtoB Magazine, MarketingProfs and MarketingSherpa. Paul holds an Executive Certificate in Strategy and Innovation from MIT’s Sloan School of Management and a bachelor’s degree in Marketing and Computer Science from Ithaca College.