Because nudges interrupt employee attention, every nudge needs a compelling reason to justify itself. Overuse can lead to ‘nudge fatigue,’ with employees potentially ignoring them. (Credit: TippaPatt/Adobe Stock)

Organizations have long faced the ongoing threat of human behavior. Whether by using weak or reused passwords, careless clicking, or neglecting to adhere to protocols, employees too often unwittingly become the security chain's biggest threat. They resort to convenience when that email appears urgent, or when that login page is not scrutinized.

Legacy training programs for employees are lacking in two essential ways: rigid schedules may cause a timing disconnect with real security events, and generic modules may fail to align with individual habits or knowledge deficits.

That's where security nudges — small, timely, behaviorally informed prompts — get involved. Instead of using lengthy training sessions in strict blocks of time, nudges appear in the moment to encourage users towards safer options with cognitive cues, such as friendly reminders, warnings, or contextual tips, guiding user behavior and minimizing risk.

Understanding security nudges

The theory of the nudge is one borrowed from behavioral economics. The theory is premised on the belief that small changes in decision-making context can bring about significant changes in behavior.

In the world of cybersecurity, nudges can be a pop-up reminder, a warning banner, or a pre-filled security suggestion. These interventions are meant to be intrusive, real-time suggestions enabling employees to adjust to risks as they crop up. These nudges make one pause and think, prompting the individual to make a smarter, safer decision.

Security nudges operate by catching the user at the moment of decision and correcting potentially hazardous behavior, not in hindsight, but as it is being initiated. This immediate correction is key to the effectiveness of micro-interventions: they address intent, not action. By incorporating such cues into everyday processes, organizations can reinforce proactive security habits that reduce human errors and help spur a positive cybersecurity culture.

How security nudges work

Security nudges are based on real-time vigilance, including data loss prevention (DLP) notifications, behavior analytics, and rule engines that correlate dangerous user patterns with predefined nudges. Frequency and timing can be optimized by machine learning to keep nudges relevant without becoming too noisy.

A security nudge is most effective when it is context-aware and action-triggered (e.g., sharing a sensitive file with an external party); when it is least disruptive (e.g., one-click resolution or a temporary pop-up); or when it proposes an exact action explicitly, and maintains user autonomy.

Real-world applications

Below are examples of organizations that exemplify the fusion of behavioral science, real-time analytics, and user-centric design to deliver effective cybersecurity nudges.

Adaptive nudges

Microsoft uses contextual, data-driven nudges that are engineered to minimize friction and applied to encourage millions of individuals to make safer choices. When users sign in from an unfamiliar device, they are prompted to enable MFA. The nudge is given in context, when the user is deciding on access, raising the probability that they will follow through.

Microsoft Defender for desktop apps will automatically mark emails with such alerts as, "This message comes from outside the organization. Be cautious with links and attachments." This gentle reminder causes users to pause/hesitate before clicking, particularly in phishing-vulnerable environments.

Microsoft Purview's Adaptive Protection dynamically remediates elevated-risk DLP policies against a user's risk level. A user with high insider risk might have more stringent nudges or block the copying of files to USB devices, or when uploading to home cloud storage. Lower-risk users might only receive gentle reminders.

Just-in-time (JIT) nudges at the moment of risk

Google noticed that even highly trained staff members sometimes make dangerous choices, such as omitting to enable two-factor authentication (2FA). To rectify this, they implemented JIT security nudges, which pop up immediately when a dangerous action is being initiated.

For instance, a user attempting to share a confidential document outside the company is presented with a prompt: "This file contains sensitive data. Are you sure you want to share it externally?" On signing into a new device, users may be prompted to enable 2FA.

Best practices for using security nudges

Here are a few key principles that can improve the success of security nudges:

  • Personalize: Generic messages tend to be ignored. Tailored and context-aware prompts can be more effective.
  • Avoid overuse: Because nudges interrupt employee attention, every nudge needs a compelling reason to justify itself. Overuse can lead to ‘nudge fatigue,’ with employees potentially ignoring them.
  • Enable users: The best security nudges don't command or force, they assist. When users feel in charge, they're much more likely to behave safely.
  • A/B testing: Security nudges should not be considered a one-and-done remedy. It's important to consistently test different types, timing, and placement of nudges to optimize their effectiveness.
  • Seamlessly integrated: Nudges have to be perceived as an organic element of the user experience and not as interruptions or additional tasks.

As cyber threats multiply and get more advanced, the security tools we employ must adapt in kind. Sometimes the best type of change is merely a gentle push in the right direction. Security nudges combine the focus of automation with the expertise of behavioral science to promote better decision-making at the point when it matters most.

They’re low-cost, highly targeted, and respectful of user autonomy, making them a must-have in any modern security toolkit.

About the author

Erich Kron is Security Awareness Advocate for KnowBe4, the world-renowned cybersecurity platform that comprehensively addresses human risk management with over 70,000 customers and more than 60 million users. A 25-year veteran information security professional with experience in the medical, aerospace, manufacturing, and defense fields, he was a security manager for the U.S. Army's 2nd Regional Cyber Center-Western Hemisphere and holds CISSP, CISSP-ISSAP, SACP, and other certifications. Erich has worked with information security professionals around the world to provide tools, training, and educational opportunities to succeed in information security.

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