Risk reduction: The process of decreasing the potential damage or loss from a risk through preventative measures or actions. This could involve applying controls or safeguards to reduce vulnerabilities, transferring the risk to another party, or avoiding the risk altogether. The aim of risk reduction is to lessen the probability of occurrence or the impact severity of a risk to an acceptable level.

Risk Rejection: An informal risk management approach where an organization chooses to ignore or deny the existence of a risk, often due to a lack of awareness or unwillingness to address it. This non-strategic behavior can stem from a cultural aversion to dealing with risks and generally leads to unpreparedness and vulnerability to potential threats.

Risk response: The process of deciding on how to approach and deal with identified risks. The four primary responses to risk are acceptance (tolerating the risk), avoidance (changing plans to evade the risk), mitigation (reducing the impact or likelihood of the risk), and transfer (shifting the risk to a third party). The chosen response will depend on the organization's risk tolerance, the potential impact of the risk, and the cost of the response.

Risks by cloud deployment model: The unique vulnerabilities and threats associated with different cloud deployment models, including public, private, hybrid, and community clouds. Factors such as data sensitivity, regulatory compliance, and the ability to control data and services affect the risk profile of each model.

Risks by cloud service model: This entails the potential security issues linked to different cloud service models, namely infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). Each model has varying degrees of control over data and resources, leading to a unique set of potential security risks.

Risk Scenario: A hypothetical situation or sequence of events that could lead to a risk event. It describes a particular risk in the context of its triggers, events, impacts, and possible responses. By visualizing how a risk might occur and its potential effects, risk scenarios help organizations prepare for and mitigate risks more effectively.