Managing Information Assurance Risks in Healthcare
There has been a tremendous explosion of information technology (IT) in healthcare caused by billions of dollars of government incentives for usage of digital healthcare tools. But, IT systems face threats with significant adverse impacts on institutional assets, patients, and partners if sensitive data is ever compromised. Every health enterprise is required to maintain confidentiality, integrity and availability of its information assets (this is called “information assurance” or IA). Confidentiality means private or confidential information must not be disclosed to unauthorized persons. Integrity means that the information can be changed only in an authorized manner so as to maintain the correctness of the information. Availability defines the characteristic that information systems work as intended and all services are available to its users whenever necessary.
It is well known that healthcare organizations face and have been mitigating many risks such as investment risk, budgetary risk, program management risk, safety risk, and inventory risk for many years. What’s new in the last decade or so is that organizations must now manage information assurance risks related to operating its information systems. IT is now just as critical an asset as most other infrastructure managed by health systems. It is important that information security risks are given the same or more importance and priority as given to other organizational risks.
As health records move from paper native to digital native, it’s vital that organizations have information risk management programs and security procedures that are woven into the culture of the organization. For this to happen, basic requirements of information security must be defined and implemented as part of both the operational and management processes. A framework that provides guidance on how to perform these activities, and the co-ordination required between these activities is needed.
The Risk Management Framework (RMF), supported by the National Institute of Standards and Technology (NIST) provides this framework. The NIST 800 series publications provide a structured approach to achieve risk management. It provides broad guidance and not necessarily all the prescriptions, which means it can be tailored to meet the organization’s specific needs and providing the flexibility needed for the different organizations. Using the NIST RMF helps organizations with risk management not only in a repeatable manner, but also with greater efficiency and effectiveness. Healthcare information assurance is complex and without a framework that takes into account a broad risk management approach, it is difficult to consider all the intricacies involved.
As shown in the diagram below, the NIST Risk Management Framework consists of a six step process designed to guide organizations in managing the risks in their information systems.
The various steps as defined in the NIST specifications are the following:
- Categorize the information system and the information processed, stored, and transmitted by that system based on an impact analysis.
- Select an initial set of baseline security controls for the information system based on the security categorization; tailoring and supplementing the security control baseline as needed based on an organizational assessment of risk and local conditions.
- Implement the security controls and describe how the controls are employed within the information system and its environment of operation.
- Assess the security controls using appropriate assessment procedures to determine the extent to which the controls are implemented correctly, operating as intended, and producing the desired outcome with respect to meeting the security requirements for the system.
- Authorize information system operation based on a determination of the risk to organizational operations and assets, individuals, other organizations, and the Nation resulting from the operation of the information system and the decision that this risk is acceptable.
- Monitor the security controls in the information system on an ongoing basis including assessing control effectiveness, documenting changes to the system or its environment of operation, conducting security impact analyses of the associated changes, and reporting the security state of the system to designated organizational officials.
All information systems process, store and transmit information. What is the possible impact if a worst case scenario occurs that causes endangers this information? A structured way to find out the potential impact on the confidentiality, integrity and availability of information can be done through the first step of NIST RMP, the categorization of information systems. The NIST SP 800-60 provides such guidance. The potential impact is assigned qualitative values – low, moderate, or high. Based on these impact levels for each of the information type contained in the system, the high water mark level is calculated, that helps in selecting the appropriate controls in the subsequent steps.
Organizations need to mitigate risks adequately by selecting an appropriate set of controls that would work effectively. In the selection of security controls step, the set of controls are chosen based on the categorization of the information system, the high water mark and the goals of the organizations. These baseline controls are selected from NIST SP 800-53 specification, one of three sets of baseline controls, corresponding to low, moderate, high impact rating of the information system. These baseline controls can be modified to meet specific business needs and organization goals. These tailored controls can be supplemented with additional controls, if needed, to meet unique organizational policies and environment factors and its security requirements and its risk appetite. The minimum assurance requirements need to be specified here.
All the activities necessary for having the selected controls in place, is done in the implementation of security controls step. The implementation of the selected security controls will have an impact on the organization risks and its effects. NIST SP 800-70 can be used as guidance for the implementation. An implementation strategy has to be planned and the actions have to be defined and the implementation plan needs to be reviewed and approved, before the implementation is done.
Once the controls are implemented, then the assessment of security controls is done to find out whether the controls have been correctly implemented, working as intended, and giving the desired output with respect to the security requirements. In short, whether the applied security controls are indeed the right ones, done in the right way, giving the right outcome. NIST SP 800-53, NIST 800-53A, NIST 800-115 can provide the necessary guidance, here.
The authorization of information systems is an official management decision, authorizing that the information system can be made operational, with the identified risks mitigated and the residual risks accepted, and is accountable for any adverse impacts on the confidentiality, integrity and availability of information systems. If the authorizing personnel find that the risks are not mitigated and hence can compromise the sensitive information, they can deny authorizing the information system. NIST SP 800-37 provides guidance on authorization. The authorizing personnel are to be involved actively throughout the risk management process.
Risk management is not one-time process, that once it is done, it is forgotten. It is a continuous process, to be integrated with day-to-day activities. One of the key aspects of any risk management is the monitoring of security controls to check whether the controls are performing as intended. The main focus of monitoring security controls is to know whether the controls are still effective over a period time, given the changes that occur in the information systems — the changes in hardware, software and firmware, the changes in environment factors, operating conditions etc. NIST SP 800-37 provides guidance about this. And if the security controls are found to be ineffective, the cycle starts again, with either re-categorization or selecting another set of baseline controls, or assessing the effectiveness of the controls once more etc.
And, in all the steps in risk management framework, one of the important aspects is communication. Appropriate documents needed to be generated in all the steps, reviewed and kept up-to-date.
Organizational risk management provides great benefits to the organization because it helps to prioritize the resources, increase interoperability, and reduce costs incurred due to the adverse effects. It helps to prevent unauthorized access to personally identifiable information which will lead to security breaches.