As the new year begins and business leaders refine their 2019 plans, how to effectively deploy technology increasingly will be a focal point of conversations in the boardroom and elsewhere throughout the enterprise. While trending technologies such as artificial intelligence, blockchain and 5G wireless networks command much of the mindshare in the new year, one technology that might no longer be deemed buzzworthy should nonetheless be a major consideration in 2019 for the C-suite and security teams alike \u2013 how to derive value while mitigating risk from big data.\u00a0The term \u201cbig data\u201d has been in circulation for many years, but big data continues to evolve in scope and capability, especially with AI, augmented analytics and other emerging technologies enabling data to be harnessed in more sophisticated fashion.\u00a0ISACA\u2019s 2018\u00a0Digital Transformation Barometer\u00a0shows that big data remains the technology most capable of delivering organizations transformative value, and it is easy to see why. The positive potential of big data is enormous, spanning virtually all industries and impacting both the public and private sectors. Of critical importance, organizations can tap into big data sets to better understand their customers and configure predictive models that allow them to be more strategic and proactive in their business planning.\u00a0While the benefits for private-sector enterprises are immense, there is perhaps even more upside for society, generally. For example, big data can be used to accelerate the progress made in scientific research, improve patient outcomes in healthcare by revealing more nuanced treatment patterns and aid in the modernization of urban centers by allowing cities to more effectively govern traffic flow and the deployment of city resources. In the context of these and other high-impact innovations that are in progress, the Internal Data Corporation (IDC)\u00a0made the whopping projection that worldwide revenues for big data and business analytics will reach $260 billion by 2022.\u00a0Big data has distinct security concernsDespite the considerable enthusiasm for big data-driven projects and use cases, big data also presents a range of evolving challenges from a security and privacy standpoint. All emerging technologies introduce new threats, and the same holds true for big data. While many of the fundamentals of network security apply to big data, there are some\u00a0distinct considerations when it comes to securing big data. Enterprises often turn to NoSQL databases, which allow for more scalability than conventional, relational databases, to store big data, introducing new cost and security challenges.Additionally, traditional controls such as encryption may introduce bottlenecks due to the size of the data, meaning practitioners need to become more creative in protecting big data. Data anonymization, which allows organizations to protect the privacy of individuals within a data set, is typically an effective approach, and can be especially useful when enterprises are working with third-party vendors. Further, security frameworks, particularly those that align with pertinent standards and regulations, can be utilized during big data implementation projects in order to incorporate all appropriate controls by design. These frameworks also help organizations avoid taking shortcuts in their data governance that could open the door to a large-scale breach or, on a less dramatic but still significant note, identify inefficient practices that do little to help organizations extract value from their data.\u00a0Whatever approaches are taken, enterprise leaders need to be every bit as committed to safeguarding big data as they are to the data\u2019s collection and utilization. Without a doubt, big data presents an attractive target to attackers since big data is highly valued \u2013 after all, the bigger the data, the bigger the breach. Several attack types exist, potentially impacting both the confidentiality and the integrity of the data, meaning security practitioners must possess an overarching understanding of the threats that could impact the data. This challenge becomes all the more difficult considering the wide variety of sources and data types that encompass big data.Although the security risks that that accompany big data can be daunting, addressing these concerns head-on is the only viable option, as big data becomes an increasingly valuable asset for enterprises to harness. Not only does the proliferation of data in the digital transformation era create new security risks, but the complexity of storing and managing the data can contribute to lower employee morale and higher turnover among IT professionals,\u00a0according to a Vanson Bourne study. All of these factors call upon organizations to develop a cohesive, holistic strategy for big data, with extensive collaboration between the C-suite and enterprise security leaders. We have seen the hype around many emerging technologies ebb and flow in recent years, but the need to effectively handle big data has become a fixture on the enterprise landscape that will require ongoing attention and investment in the new year, and beyond.