Taking Critical Infrastructure Security Beyond Physical Credentials

Many critical infrastructure sites are still using traditional systems like physical credentials or tokens for access control. Badges, PINs, and punch cards are commonly used because they are familiar and easy. But these traditional systems often leave gaps that make security vulnerable and disrupt operations, risks that critical infrastructure cannot afford.

Weak security in critical infrastructure facilities can easily lead to security breaches. We rely on these sites to provide 24/7 essential services and to adhere to strict regulations, and access control gaps or failures can affect safety and daily operations. A loss of public trust and business continuity are often the very expensive results. 

Physical credentials can leave facilities open to security vulnerabilities. Badges can be lost, stolen, or exploited by malicious actors. They might be shared during a busy shift if a coworker forgets theirs, or teams may reuse old cards if one is lost. Sometimes, access remains active for someone who left the company long ago, or a contractor who no longer needs access. 

The Verizon Data Breach Investigations Report shows that weak or stolen credentials remain a major cause of security breaches. This not only allows unauthorized access but also makes it hard to accurately track who was present by manually checking logs.

These factors are prompting today's critical infrastructure security leaders to re-evaluate their access control. With advances in biometric access control, organizations now have more secure and reliable options that can be integrated with or replace their existing physical credentials. Using biometrics that can’t be spoofed like iris or face authentication ensures rapid and accurate detection. It also eliminates common issues like tailgating and piggybacking.

The High Cost of Credential Failures and Physical Security Breach 

Many facility managers may feel that managing traditional badges and credentials is simple: new hires are issued a physical badge or PIN for controlled access. When staff leave the company, that access should be revoked by collecting the badge or deactivating the PIN. Often, systems aren’t managed this efficiently, and badges can be lost or used for tailgating. 

Updates to access control are often delayed or overlooked, especially in fast-paced workplaces. Offboarding is often complex, especially during events like a terminal expansion or major server migration. If a badge or code remains active in cases like sudden termination or resignation, the facility may be exposed due to loss, misuse, or human error. 

Auditing these events can be complicated. Teams often must search through badge logs, door records, and email chains to piece together what happened. 

This impact goes beyond security teams. Depending on the severity of a physical breach, operations, risk, and company reputation can be affected. This doesn’t even address the costs involved in a major incident. Estimates from 2022 showed that global companies lost $1 trillion in revenue from physical security incidents. 

Rethinking Access Control: A Focus on Identity

It is standard for most high-security sites to implement multiple layers of access control. In data centers, critical zones like server rooms, network operations centers, and power supply rooms are only accessible to select personnel. Facilities will use permission-based access to secure areas depending on role, such as IT administrators, and senior engineers, versus authorized office workers or maintenance staff. Office areas may have broader access, while areas like storage vaults, network closets, or backup tape archives are further restricted.

In airports, highly secured zones include the air traffic control tower, baggage handling areas, access across landside to airside and maintenance hangars. Access to these areas is limited to staff with specific roles and clearances. Physical credentials alone often fall short in these complex environments, making identity-based access solutions an essential consideration. 

Identity-based access works reliably even in poor lighting or when staff are wearing safety gear or PPE, situations that often cause issues with legacy solutions. Multiple biometric checks make entry smoother, helping authorized personnel move efficiently while preventing unauthorized access.

Additionally, iris and face biometrics are unique to each person and nearly impossible to fake. Iris recognition has almost a zero false acceptance, making it one of the safest and most effective ways to control access. Each iris has over 240 unique patterns, so access is fast and reliable. By implementing multi-modal authentication, for example, combining iris authentication with facial recognition or an existing physical credential, security is further strengthened.

Biometric authentication is fast, touchless, and reduces incidents like tailgating and piggybacking. Security teams can see exactly who entered and exited, with higher efficiency and without sorting through stacks of paper logs. When an audit or investigation occurs, the event logs are clear, precise, and easy to find.

From Physical Credentials to Identity-First

Critical infrastructure facilities aren’t simply moving away from traditional access methods like badges. Many sites are augmenting current systems with multi-factor authentication, adding biometric credentials to boost security, and even storing the biometric data on the physical cards to support privacy initiatives. 

Evaluating identity-based biometrics is about making strategic business decisions that can save time, reduce costs, and protect valuable assets. This approach can also prevent costly breaches, minimize operational disruptions, and ensure long-term resilience.

Relying solely on physical credentials can be outdated and introduce unnecessary risk. Controlling access with iris or facial biometrics, or combining them with innovations like multimodal authentication can deliver high security, reduced risk, and improved operational efficiency.