Game theory is the science of strategy. A branch of mathematics and economics that explores strategic situations across multiple stakeholders with different goals, whose actions can affect one another. Pioneering companies are changing the game with blockchain technologies. The new game of consumer interactions redefines transparency, immutability and security across industries.\nNew game with new players\nMuch progress has been made with game theory. John von Neumann and Oskar Morgenstern\u2019s 1944 book Game Theory and Economic Behavior outlined classic game theory. Franklin D. Roosevelt stated that \u201ccompetition has been shown to be useful up to a certain point and no further, but cooperation, which is the thing we must strive for today, begins where competition leaves off.\u201d Game theory analyzes strategic interaction and can be applied to economics, political science and military science. In game theory, players (decision-makers) adopt strategies (complete plans of action) and receive payoffs (rewards or punishments), all of which depend on the strategies of all of the players. A strategy is a complete plan that describes the action a player will take in every circumstance that is observed.\nThere are many common examples of game theory that include elections, auctions, wars, the arms race, oligopolies (when a small number of companies dominate a market), certain aspects of animal behavior, the evolution of social norms and, of course, games such as the ones played for entertainment, like Pok\u00e9mon GO.\nIf you have played the board games Monopoly, Risk or Stratego, you knew who you were playing the game against. Today, players are less obvious. Likewise, partners you wouldn\u2019t consider yesterday might be your best avenue for a competitive advantage. Change the rules with three of the leaders in blockchain technology.\nBron.tech (Sydney, Australia)\nProblem Solved: Proving identity requires sharing too much identifiable information.\nWhy play today\u2019s game with yesterday\u2019s identity solutions?\u00a0Bron.tech\u00a0is revolutionizing identity. The bold vision of a personally controlled digital identity platform to encompass the legal, social and psychological aspect of one\u2019s identity. Bron.tech has three flagship interaction offerings.\n\nOWLEE is a distributed application (dapp) reputation system providing instantaneous verification, identity management and interoperability for education providers, organizations and professionals.\nBlockchain Digital ID, Bron.tech\u2019s ID platform is the solution for issuance, verification and use of digital identities by leveraging cryptography and storing transaction proofs on a public or private immutable ledger (blockchain). Using multiparty computation enabled by the blockchain to share an identity.\nCyph.MD is a healthcare data-sharing platform. It leverages asymmetric cryptography with a hierarchical certificate system whereby every healthcare provider can issue identity tokens to its practitioners \u2014 to securely communicate and share data across the entire healthcare network.\n\nGem (California, United States)\nProblem Solved: Personalized care is compromised without the privacy and security of the universal infrastructure.\nConcerned about the hidden cost of trust over truth? Gem fuels automation with integrity, and helps to create data, identity and logic frameworks that allow companies to share data with industries by customizing participation within a blockchain network \u2014 cross-industry applications are connecting customers to products, services and interactions. Gem offers three integrity solutions:\n\nDistributed Resource Registries to define resources managed within a blockchain.\nMultiparty Identity and Access Management to control access to provisioned resources for key management, e.g. manufacturing or IoT and healthcare medical records.\nLogic Automation using rules to streamline data interactions across companies.\n\nIBM Blockchain on Bluemix (New York, United States)\nProblem Solved: People don't own their data.\nAttempting to secure digital assets? IBM Blockchain on Bluemix digitizes transaction workflow and secures digital assets within a private virtualized environment. IBM Blockchain allows companies to manage, develop and test blockchain network technology using flexible platforms and infrastructure offerings to manage blockchain networks. The core principles make up the IBM blockchain approach: community (donated over 44,000 lines of code to the Hyperledger Project), cloud (value-based services such as high-availability, compliance and security) and client (capabilities with the building, piloting and implementing).\n\nIBM Blockchain on Bluemix enables enterprise blockchain solutions at scale.\nHyperledger Project facilitates open-source, openly governed, cross-industry-enabled blockchain technology.\nDocker Hub is designed to help companies deploy and support distributed applications throughout the entire life cycle.\n\nWho\u2019s playing the game?\nThe application of game theory in business centers on the interactions of multiple players. Everyone understands games. Competitive pricing to labor negotiations provides similar structures to analyze possible strategies and recommend and optimal strategy for each player. Adam Brandenburger and Barry Nalebuff in a Harvard Business Review article explained how game theory shapes strategy. Whether a high-stakes game or no stakes at all, every game has five elements.\n\nPlayers (who\u2019s involved).\nAdded values (unique value of each player).\nRules (structure).\nTactics (how players move to shape how other players move).\nScope (game boundaries).\n\nAs 2016 closes and 2017 opens, pause to reflect on the game your company is playing and the players at the table \u2014 the game might have changed, and you might not notice all the players. Explore partnerships to redefine the rules and create a new game \u2014 be the player in the game others don\u2019t notice.