Blockchain-based multimedia security

Economic Incentives and Blockchain Security

Much like steam engines and the internet, blockchain has emerged as a disruptive technology and a foundation for tomorrow’s businesses and ecosystem. Blockchains meld technology and economics to provide unprecedented security guarantees. As individuals seek to reduce uncertainties, economic incentives can drive human behavior, and act as the enablers of personal security, either perceived or re...

Speed-Security Tradeo s in Blockchain Protocols

Transaction processing speed is one of the major considerations in cryptocurrencies that are based on proof of work (POW) such as Bitcoin. At an intuitive level it is widely understood that processing speed is at odds with the security aspects of the underlying POW based consensus mechanism of such protocols, nevertheless the tradeo between the two properties is still not well understood. In th...

Speed-Security Tradeoffs in Blockchain Protocols

Transaction processing speed is one of the major considerations in cryptocurrencies that are based on proof of work (POW) such as Bitcoin. At an intuitive level it is widely understood that processing speed is at odds with the security aspects of the underlying POW based consensus mechanism of such protocols, nevertheless the tradeo between the two properties is still not well understood. In th...

Blockchain Based Access Control

Access Control systems are used in computer security to regulate the access to critical or valuable resources. The rights of subjects to access such resources are typically expressed through access control policies, which are evaluated at access request time against the current access context. This paper proposes a new approach based on blockchain technology to publish the policies expressing t...

Multimedia Security Handbook