Risky Science of Risk Assessment - DZone Security

Risky Science of Risk Assessment - DZone Security

Data is the currency of the digital age. It is the foundation for analytics. The value of data lies in the context it provides and the timeliness of its content. Information decline is an important concern for data scientists in predictive security analytics. Using risk scores effectively, data decay can be mitigated.

Data is the currency of the digital age. It is the foundation for analytics. The value of data lies in the context it provides and the timeliness of its content. Information decline is an important concern for data scientists in predictive security analytics. Using risk scores effectively, data decay can be mitigated.

Risk Scoring Transactions

The riskiness of a transaction, or a user’s activity, is often assessed in security analytics to detect a threat, or to prevent an attack. Predictive modeling uses a set of well-known analytical techniques applied to the cybersecurity domain to risk score event-based transactions. These scores convey a sense of “riskiness” for that event at a transactional level but does not capture user intent. To quantify user behavior, there is a need for aggregating event-based scores from various models. The risk score will then be the summary of multiple scores obtained from various individual scoring algorithms within a system.

Aggregating Risk Scores Across Different Models

Combining risk scores from different models, can be a problematic process. Risk assessed from one component should not duplicate or dominate risk from other models for a given user or entity. The aggregate risk assessment must be meaningful, providing helpful context to assure the minimization of false positives. In addition, some behavioral components may have varying degrees of importance than others, and as a result must be weighed accordingly within the broader context of the established and evolving baseline of an individual and their peer group’s persona of ‘normal’ behavior.

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Risky Science of Risk Assessment - DZone Security

Risk assessment is risky business, and even more so when dealing with risk score decay and of cybersecurity threats.

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