Quantifying Security in blockchain

[Vishwas1]

• Security analysis of cryptocurrency protocols is complicated by many factors
• One such complicating factor is the rational self-interested nature of participants
• The ideal protocol is an incentive compatible Nash equilibrium such that deviating from the protocol does not result in a net gain
• Another complicating factor is whether the power to achieve or disrupt con- sensus is extrinsic in origin or intrinsic in origin