Digital signature company DocuSign might have little to do with bitcoin at first glance. The firm's business is replacing ink signatures on paper with its own electronic version.

But the audience listening to DocuSign founder Tom Gonser at Web Summit in Dublin last week might have been forgiven for thinking they'd stumbled onto a sermon about the benefits of the blockchain.

Gonser ran through the complexities of identity and contract management in a digital age, pointing out that different jurisdictions had very different ideas of what constituted a valid contract. He stood on stage in Dublin and waved a $5 bill at the audience, saying:

"This is a contract ... I'll give this bill to whoever wants it. But you have to go to a pub and try to buy a beer with it. You'll have a hard time, because they'll say no, I need to take euros."

In a bitcoin sermon, this is where the blockchain and decentralisation comes in. Instead, Gonser's talk continued with the credit card companies – Visa, and MasterCard – solving the problem of converting cash in different jurisdictions by "hiding" the transactions behind a single credit card, which they issued.

source:http://www.coindesk.com/docusign-founder-sees-blockchain-tech-potential-identity-management/