With the increasing number of cyber attacks, the development of cyber insurance products are essential to the resilience of the economic fabric, and an opportunity for insurers to develop a new market. On the other hand, risk management of cyber insurance portfolios is a challenging task, due to the novelty of the risk and the difficulty to properly identify its impacts. Moreover, in addition to the volatility of cyber risk, accumulation phenomena may occur: a "cyber hurricane" may simultaneously strike a large part of the portfolio. In this presentation, we will explore tools that may be helpful to identify this risk and to develop diversification solutions that can allow us to anticipate (and potentially prevent) such events.