Blockchain for Distributed Systems Security (9781119519584) by unknow

Author:unknow
Language: eng
Format: epub
ISBN: 9781119519584
Publisher: John Wiley & Sons Inc
Published: 2019-03-09T00:00:00+00:00

The cyberattacks and defense actions can be modeled as a typical multi-agent game for security. The organizations’ strategies are attacked by the malicious actions of attackers. Defense actions based on the attackers’ strategies are also taken by defensive organizations and shared through BIS. This game can be formulated as a Stackelberg game with leader and follower subgames. It should be noted that government and industrial standard practices about hardening the network system on occurrence of cyberattacks and detection of vulnerabilities must be upheld by organizations. Thus, in the Stackelberg game, attackers are treated as leaders since they initiate attacks on the organizations’ network system, while legitimate organizations are treated as followers since they only react to the cyberattacks or known vulnerability.

Defenders/follower subgame—This game is represented as an optimization problem with the goal for a given organization, k, being to minimize the impact of the attack. Based on the security state of an organization and motivation of attack, an attacker chooses a strategy ak, ∀k with a security impact level to the victim organization, k, as im, k. The optimization problem is presented as:

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