“The Ethereum blockchain allows it’s users to deploy distributed applications (known as smart contracts) that can be used for a wide variety of tasks, such as creating digital marketplaces, payment systems and fully autonomous ride-sharing services. All of this can be achieved without a trusted third-party or the risk of censorship.These amazing possibilities do however come at a price.As with most immature technologies, the ecosystem is riddled with security issues and the economical incentive for malicious hackers is significant.”

Price: Free

Link: http://www.foocafe.org/malmoe/events/1760-outsmarting-smart-contracts