Regulatory arbitrage is the practice of choosing a jurisdiction with lighter rules to lower compliance costs, speed deployment, or reduce legal exposure. In cyber security, this matters because the place where a service is built, hosted, or sold can change which privacy, logging, incident reporting, and governance controls are required. A company that designs only for the weakest regime may discover later that it still needs stronger safeguards when it handles foreign data or enters stricter markets.
It appears in real attacks and defenses in different ways. Criminals may register domains, host infrastructure, or process payments in places with limited enforcement to make takedowns harder. Defenders and vendors may use favorable jurisdictions for operations, but they still need audit trails, access controls, and data-handling policies that satisfy cross-border rules. The security risk is simple: cheaper compliance now can create expensive remediation later.