More than just the system behind Bitcoin, blockchain is a new technology that has the potential to change the financial industry and beyond. But what is it, really? And what should you be aware of when looking to implement blockchain technology into your organization? This talk will cover the fundamentals of how blockchains work, newer implementations and variations on the original Bitcoin specification, and finally, the security implications inherent in the technology. Both vulnerabilities and mitigations will be covered, as well as developing methods to audit the security of any blockchain implementation. Whether you are building the next blockchain technology or looking to implement blockchain into your organization, this talk will leave you with the fundamental knowledge you need to do so securely.