  The lack of data sets derived from operational enterprise networks continues
to be a critical deficiency in the cyber security research community.
Unfortunately, releasing viable data sets to the larger com- munity is
challenging for a number of reasons, primarily the difficulty of balancing
security and privacy concerns against the fidelity and utility of the data.
This chapter discusses the importance of cyber secu- rity research data sets
and introduces a large data set derived from the operational network
environment at Los Alamos National Laboratory. The hope is that this data set
and associated discussion will act as a catalyst for both new research in cyber
security as well as motivation for other organizations to release similar data
sets to the community.
