From MKL to RKL: When and Why to Make the Switch in ATM Security
The way you manage cryptographic keys is no longer just an IT detail—it’s a core business decision. ATM fleets, processors and financial institutions are under pressure to deliver secure, seamless customer experiences while protecting against increasingly sophisticated threats. In this environment, your approach to key management can make the difference between resilience and risk.
For decades, Manual Key Loading (MKL) has been the default. Teams meet at ATMs in pairs, enter keys manually and follow cumbersome procedures to remain compliant. But as technology evolves and threats multiply, relying solely on MKL is like running your business on dial-up in a fiber-optic world.
That’s why institutions are asking: When should I upgrade from MKL to RKL? The answer is simple: now.
The Security Imperative
MKL exposes institutions to one unavoidable truth: every manual touchpoint increases risk. Each key ceremony involves people, paper and physical presence—all of which are vulnerable to human error.
By contrast, Remote Key Loading (RKL) automates the process. Keys are securely transmitted and injected using asymmetric cryptography, drastically reducing exposure to clear-text keys or mishandling.
For CISOs, compliance officers and security leaders, the benefits are clear:
- Stronger protection against fraud and insider risk
- Built-in compliance with PCI PIN standards such as TR-31 and TR-34
- Future-proofing as regulators push toward eliminating outdated methods
When auditors arrive, RKL speaks for itself: a hardened, automated process that leaves less room for error and more confidence in your compliance posture.
The Operational Advantage
Ask any COO or operations leader about MKL and you’ll hear the same pain points: scheduling two-person teams, driving to locations and taking ATMs offline for key ceremonies. Each visit costs time, labor and—most critically—downtime for your customers.
RKL changes the equation. With keys delivered electronically, institutions can:
- Reduce truck rolls and in-person key ceremonies
- Minimize ATM downtime and disruption for cardholders
- Free up staff to focus on higher-value work instead of routine key management
For operations leaders, this isn’t just an upgrade in security. It’s an upgrade in efficiency.
The Business Case for Leadership
From the CEO’s perspective, every technology decision is based on ROI, reputation and resilience. RKL delivers on all three.
- Cost Savings: Less downtime and fewer truck rolls mean lower operating costs over time
- Customer Trust: A single compromise can tarnish your institution’s reputation. RKL shows proactive investment in security
- Scalability: As your ATM fleet grows or consolidates, RKL ensures your cryptographic infrastructure can keep pace
In short, RKL is a strategic investment in protecting your business and brand.
Why the Time Is Now
Every day that passes with MKL as your standard is another day of unnecessary risk, inefficiency and added cost. The move to RKL is no longer a matter of if—it’s a matter of when.
For financial institutions, processors and OEMs, the smartest move is to transition before regulatory mandates or security incidents force your hand. Early adopters aren’t just compliant—they’re confident, efficient and better prepared for the future.
Ready to Upgrade?
At Trusted Security Solutions, we’ve helped institutions of every size move seamlessly from MKL to RKL. Our A98 ATM Key Management System is designed to meet you where you are today and scale with you tomorrow.
Why wait for a crisis? Make the move now. Contact us to see how RKL can transform your security, operations and bottom line.
Partnerships in ATM Security: Why Expertise Matters
In the evolving world of ATM security, having the right partner can make a significant difference. As technology advances and regulatory requirements grow more complex, financial institutions and ATM operators benefit from working with experts who understand the nuances of compliance, encryption and risk management.
With decades of experience and deep specialization in ATM security, Trusted Security Solutions (TSS) empowers financial institutions to stay ahead of risks and regulatory changes. In this article, we’ll explore three critical service areas where partnerships make all the difference and why having TSS in your corner is a strategic advantage.
PCI Compliance: Partnering for Proactive Protection
The Payment Card Industry Data Security Standard (PCI DSS) constantly evolves. Staying compliant means understanding technical updates, anticipating changes and adapting quickly—all while maintaining operational efficiency.
Why Partner with TSS?
- TSS monitors the latest developments from the PCI Security Standards Council and translates them into actionable strategies for your ATM environment.
- We support clients through upcoming mandates and certifications, helping mitigate costly non-compliance risks.
- Whether navigating compliance frameworks like PCI PIN or managing multi-vendor ATM environments, TSS works closely with clients to deliver tailored guidance and operational support.
TR-31/TR-34 Key Management: Securing the Foundation
Proper key management is essential for secure ATM transactions. TR-31 and TR-34 standards define how cryptographic keys should be shared, transported and stored, and getting them wrong can lead to vulnerabilities.
Why partner with TSS?
- TSS is a leader in ATM key management services. We help institutions transition smoothly to TR-31 and TR-34, ensuring compliance and resilience.
- Our team establishes secure key handling from injection to distribution across complex environments.
- By offering key management tools and custom implementation plans, we help reduce manual errors and strengthen your cryptographic framework.
PQC and AES Encryption: Future-Proofing Security Today
As technology progresses, so do encryption practices. Many ATM operators are familiar with AES (Advanced Encryption Standard) as a current best practice for securing sensitive data. At the same time, conversations around post-quantum cryptography (PQC) are becoming increasingly relevant as the industry begins to explore how emerging computing capabilities may affect long-term data protection.
Why Partner with TSS?
- TSS works with clients to implement and maintain AES encryption practices that align with current standards.
- Our team assists with future preparedness by offering education and strategy around crypto-agility and PQC readiness.
- By staying informed on evolving encryption guidance from regulatory bodies and industry leaders, we build systems and roadmaps that allow for seamless adoption of new encryption methods as they become available.
The Power of Partnership
ATM security isn’t a set-it-and-forget-it scenario. It requires constant vigilance, specialized knowledge and the agility to adapt to change. With TSS as your partner, you don’t just keep up, you stay ahead.
Whether you're navigating PCI compliance, implementing secure key management, or preparing for post-quantum threats, our team brings the expertise and foresight needed to protect what matters most.
Let’s build your ATM security strategy together.
ATM Security Standards 101: Key Organizations You Should Know
ATM security doesn’t happen in a vacuum. Behind the scenes, global organizations constantly update frameworks, encryption protocols and best practices to keep financial systems secure. These resources form the backbone of the policies, procedures and technologies institutions depend on to protect cardholder data, maintain regulatory compliance and stay ahead of emerging threats.
Trusted Security Solutions (TSS) is an active member of three leading organizations shaping the future of ATM security: PCI, X9 and ATMIA. Understanding these organizations and their roles is key to building a resilient, compliant ATM network.
Here’s a closer look at four essential security resources and why they matter for your institution's long-term success:
The Payment Card Industry Security Standards Council (PCI SSC)
The Payment Card Industry Security Standards Council (PCI SSC) plays a critical role in safeguarding cardholder data worldwide. Formed by major payment brands like Visa and MasterCard, PCI SSC is responsible for security standards such as PCI DSS (Data Security Standard) and PCI PIN.
- These requirements govern how card data is transmitted, processed and stored within ATM networks.
- Compliance with PCI standards is mandatory for any institution handling debit and credit card transactions.
Financial institutions that process these transactions depend on PCI SSC standards to protect cardholder data and meet regulatory requirements. As a participating member of PCI SSC, we remain actively engaged with evolving requirements to ensure our clients remain compliant, audit-ready and better protected against fraud.
Accredited Standards Committee (X9)
The Accredited Standards Committee X9, commonly known as X9, develops standards for the U.S. financial services industry with a strong focus on data security, cryptographic protocols and secure key management.
- Standards like TR-31 and TR-34, essential to Remote Key Loading (RKL) operations, originated from X9 initiatives.
- These technical standards ensure secure, efficient management of cryptographic keys across ATM networks.
Institutions looking to implement Remote Key Loading, prepare for PCI PIN 3.1, or stay ahead of PCI 4.0 requirements rely heavily on the frameworks established by X9. As a proud member, TSS helps clients navigate these standards to maintain the highest levels of security and compliance.
ATM Industry Association (ATMIA)
The ATM Industry Association (ATMIA) is a global non-profit dedicated to advancing the ATM industry.
- ATMIA brings together banks, credit unions, manufacturers, service providers and security experts to address shared challenges like cybercrime, physical attacks and technology modernization.
- Their industry blueprints, best practice guides and advocacy efforts help shape the future of ATM operations worldwide.
As the ATM industry continues to evolve in response to new technologies and customer expectations, having insight is essential. Membership with ATMIA keeps us informed of emerging trends and solutions, allowing us to support our clients as the industry evolves from operating system migrations to cloud-based ATM management.
The National Institute of Standards and Technology (NIST)
The National Institute of Standards and Technology (NIST) is a U.S. government agency that develops cybersecurity standards and best practices.
- NIST’s Cybersecurity Framework is widely recognized across industries as the foundation for managing cyber risks, including those in the financial sector.
- Their guidelines support secure cryptographic operations, risk assessments and data protection—key pillars of any secure ATM network.
Following NIST frameworks supports regulatory compliance and strengthens your institution’s resilience against evolving threats, making it a cornerstone resource for those managing ATM infrastructure.
Staying Ahead of the Curve
Staying connected to organizations like NIST, PCI SSC, X9 and ATMIA is key to building a stronger, more secure ATM operation. These organizations play a central role in shaping the standards that guide how the industry protects data, manages risk and prepares for the future.
At TSS, our active involvement ensures our clients stay ahead of regulatory changes, security threats and the evolving landscape of ATM technology.
If you’re looking to strengthen your ATM security strategy, contact the TSS team to learn how our solutions align with the industry’s most trusted standards—and how we can help protect and future-proof your ATM network.
2025’s Biggest ATM Security Challenges and How to Prepare for Them
Financial institutions are facing a new wave of security challenges that affect ATM networks around the globe, especially as the digital landscape rapidly changes, seemingly by the minute. Staying ahead of the curve to safeguard sensitive financial information will require a forward-thinking approach in 2025 and beyond. From the threats of quantum computing used in cybercrime to stricter compliance requirements and essential technology upgrades, ATM security will feel more complex than ever in the new year.
At Trusted Security Solutions, we’re committed to staying ahead of the trends. In fact, we’re already working to prepare our customers for the looming TR31 deadline, which is just one of the storylines in 2025 that we’re watching closely. If you need help with TR31 compliance, contact us today!
Challenge #1: Quantum Computing Threats
What’s Happening: The advent of quantum computing is expected to revolutionize many areas of technology, but it also brings significant challenges to data security. Quantum computers, which are still in early development, can solve complex calculations far more efficiently than classical computers. This breakthrough capability could soon render traditional encryption methods obsolete, presenting an unprecedented threat to secure communications, including those within ATM networks.
Why It Matters: While quantum computing is not yet a mainstream threat, experts are concerned about its potential to disrupt current encryption methods. ATMs rely on encrypted communications to protect customer information and ensure transaction security. If traditional cryptographic protocols can be cracked by quantum-powered attacks, sensitive financial data may be exposed, and ATM networks may be at risk of breaches and fraudulent activities.
How to Prepare: Financial institutions should start planning for “quantum-resistant” encryption now, even though full-scale quantum computing is still a few years away. This may involve adopting post-quantum cryptographic algorithms designed to withstand quantum attacks. By investing in quantum-safe technology and working with vendors who prioritize cutting-edge security, institutions can prepare for a quantum-enabled future before it becomes a widespread threat.
Our Take: Post-quantum computing might feel like a sci-fi novel, but as we’ve seen with the explosion of generative AI and AI computing, it is likely closer than we think to becoming part of our daily lives.
Challenge #2: Compliance with New TR-31 Regulations
What’s Happening: As ATM security evolves, so do the regulatory standards designed to protect customers and financial institutions alike. In 2025, a key change will come in the form of TR-31 regulations, which set stricter requirements for key block management and encryption within ATM networks. These standards aim to create more secure, standardized encryption practices, ensuring the safe exchange and storage of sensitive data.
Why It Matters: Compliance with TR-31 regulations is essential for financial institutions to maintain the integrity of their ATM networks and avoid regulatory penalties. These standards impact the encryption protocols and key management practices that safeguard ATM operations. By aligning with TR-31, financial institutions can enhance security across their networks, reduce vulnerabilities, and build trust with customers by demonstrating a commitment to secure data handling.
How to Prepare: Preparing for TR-31 compliance requires a thorough assessment of current encryption protocols and key management practices. Institutions should consider adopting key management systems that are designed to meet TR-31 standards, such as the TSS A98 Key Management System. Working with experienced security partners can also help institutions navigate these new regulations and ensure a seamless transition to TR-31 compliance. Proactive planning now can prevent costly and disruptive changes down the line.
Our Take: January 2025 is right around the corner, and there are many financial institutions that are behind schedule. It’s not too late, but time is running out.
Challenge #3: Upgrading Outdated Technology
What’s Happening: Many ATM networks still rely on legacy hardware and software that may not support the latest security features or compliance standards. As technology advances, these outdated systems become more vulnerable to cyberattacks, malware and operational failures. Adding to this challenge is an increasing need to move towards cloud-based systems while maintaining compliance and security. Cloud migrations have been slow due to the need to maintain compliance when hosting data in the cloud. In 2025, consolidating equipment and upgrading these legacy systems will be critical to maintaining security and operational efficiency.
Why It Matters: Relying on outdated technology in ATM networks and data centers exposes financial institutions to numerous security risks. Older systems are often incompatible with modern security protocols and lack the flexibility needed to adapt to new threats. For instance, they may not support remote key loading (RKL) or other advanced key management techniques, making them more susceptible to unauthorized access. Or, most commonly, they might not support a migration towards cloud-based systems. Additionally, legacy systems may struggle to meet regulatory requirements, such as those outlined in TR-31, which compounds the risk of non-compliance.
How to Prepare: To ensure ATM networks remain secure and compliant, financial institutions should conduct a comprehensive review of their hardware and software infrastructure. Key steps include implementing modernized key management solutions, like the TSS A98, that support remote key loading and offer robust security features. Software updates, hardware replacements, and integration of encryption protocols compatible with emerging standards can also enhance resilience against future threats. By investing in a technology refresh, institutions can improve both security and customer experience.
Our Take: Network upgrades are expensive and time-consuming, but with TR-31 compliance, TR-34 not long after and the explosion of AI technologies, it seems likely that we will see more system upgrades in the next 2-3 years. It is critical to start conversations today that allow your organization to make adjustments as needed.
Conclusion
The security landscape for ATMs is rapidly changing, and 2025 promises to bring new challenges that require proactive planning and strategic investment. Quantum computing, TR-31 regulations, and technology upgrades represent just a few of the shifts that financial institutions must address to maintain robust ATM security.
By understanding these trends and taking early action, institutions can future-proof their ATM networks, ensuring compliance with evolving standards and building resilience against emerging threats. Preparing now, rather than reacting later, can mean the difference between a secure, compliant network and a vulnerable one.