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Measuring the effectiveness of embedded phishing exercises

Embedded phishing exercises, which send test phishing emails, are utilized by organizations to reduce the susceptibility of its employees to this type of attack. Research studies seeking to evaluate the effectiveness of these exercises have generally been limited by small sample sizes. These studies have not been able to measure possible factors that might bias results. As a result, companies have had to create their own design and evaluation methods, with no framework to guide their efforts. In this paper, we conduct a systematic analysis of data from a large real world embedded phishing exercise that involved 19,180 participants from a single organization, and utilized 115,080 test phishing emails. The first part of our study focuses on developing methodologies to correct some sources of bias, enabling sounder evaluations of the efficacy of embedded phishing exercises and training. We then use these methods to perform an analysis of the effectiveness of this embedded phishing exercise, and through our analysis, identify how the design of these exercises might be improved.

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