Attack-prevention and damage-control investments in cybersecurity

This paper examines investments in cybersecurity made by users and software providers with a focus on the latter's concerning attack prevention and damage control. I show that full liability, whereby the provider is liable for all damage, is inefficient, owing namely to underinvestment in attack prevention and overinvestment in damage control. On the other hand, the joint use of an optimal standard, which establishes a minimum compliance framework, and partial liability can restore efficiency. Implications for cybersecurity regulation and software versioning are discussed.