Your Guide To Scaling PKI Remotely

In this discussion whiteboard, let us understand what PKI is. What are the several components involved in Public Key Infrastructure (PKI)? Most importantly, how the recent global pandemic situation across the world is forcing companies to prefer remote working facilities, and this in turn is posing a lot of threats to firms’ sensitive data. To secure the sensitive data, we need to understand how to scale the Public Key Infrastructure remotely in order to defend against various data breach attacks. Let’s get into the topic:

Quick Answer: How Do You Scale PKI Remotely?

Scaling PKI remotely means replacing password-based logins and traditional multi-factor authentication with PKI certificate-based authentication, then automating certificate discovery, deployment, and renewal so a distributed workforce can be authenticated securely without manual certificate handling. Certificate-based authentication is stronger than shared secrets because private keys never leave the client device, and automation removes the operational burden of scaling PKI across remote endpoints.

Executive Summary

Remote and hybrid work spread sensitive data and authentication traffic across far more locations than a traditional office perimeter, making password-based and even traditional multi-factor authentication harder to fully trust. PKI certificate-based authentication addresses this by binding identity to a private key that never leaves the client device, rather than a shared secret that can be phished, stolen, or brute-forced. This post covers three steps to scale PKI remotely: replacing password protection, replacing traditional MFA, and automating certificate lifecycle management; a decision matrix for choosing between them; and how this connects to broader certificate lifecycle management and PKI modernization.

Who Should Care About Scaling PKI Remotely

Scaling PKI for a distributed workforce touches identity, security architecture, platform operations, and compliance. Here is what each role should do.

PKI Administrators

Scale certificate issuance and renewal capacity to match a distributed device population, and automate certificate discovery so no remote endpoint goes untracked.

Security Architects

Design the migration path from password and traditional MFA to certificate-based authentication as part of a broader Zero Trust security strategy.

Platform Teams

Own the certificate deployment tooling and remote device onboarding workflow so certificate-based authentication rolls out without breaking existing remote access.

Compliance Teams

Confirm certificate-based remote authentication satisfies applicable compliance requirements, and document the certificate lifecycle process for audit purposes.

CISOs

Treat remote authentication strength as a measurable risk area, and sponsor the shift from shared-secret authentication to certificate-based, PKI-backed authentication at scale.

Why This Matters: Data and Deadlines

According to DigiCert’s Trust Pulse Survey (July 2, 2025), nearly half of enterprises experienced a certificate-related outage in the past year, and 18.5% of affected organizations reported losses exceeding $250,000, with 37.5% of those incidents tied specifically to expired certificates. Any organization scaling certificate-based authentication across a remote workforce inherits the same operational risk if it doesn’t automate certificate lifecycle management.

The CA/Browser Forum’s Ballot SC-081v3, approved April 11, 2025, phases maximum public TLS certificate validity down to 200 days starting March 15, 2026, 100 days starting March 15, 2027, and 47 days starting March 15, 2029. Shorter certificate lifetimes make manual certificate management even less viable for a distributed remote workforce, reinforcing why automation is the third and final step in scaling PKI remotely.

NIST finalized its post-quantum cryptography standards, FIPS 203 (ML-KEM), FIPS 204 (ML-DSA), and FIPS 205 (SLH-DSA), on August 13, 2024. Organizations scaling certificate-based authentication for remote and hybrid work should build crypto agility into that rollout now, so the same PKI infrastructure can migrate to PQC-ready algorithms without a second large-scale rollout later.

Is Cybersecurity Such as PKI Still Relevant for Remote and Hybrid Work?

To answer this question, we need to understand the findings from the survey conducted by PwC to understand the financial measures CFOs are considering during the COVID-19 global pandemic to reduce their business impact and continue sustainability. An interesting reveal from this survey is that out of all the CFOs who responded to the survey, 67% are considering canceling or deferring planned investments to reduce the financial burden on their firms.

Out of the 67%, only 2% are considering cutting planned activities in Cyber security, while the rest are not willing to cut the budget on data protection. This clearly indicates the importance of cybersecurity, especially encryption and PKI, during pandemic situations where data is spread across places, as many of the employees are working from remote locations. (This PwC survey reflects CFO sentiment during the early COVID-19 period; the underlying point that cybersecurity spend holds up even when other budgets are cut, has remained true as remote and hybrid work has become permanent for many organizations.)

What Makes Cyber Security, Especially PKI, Critical for a Distributed Workforce?

It is a well-known fact that Cyber Security is critical to any firm with sensitive data, even before the COVID-19 pandemic hit the globe. During the COVID-19 pandemic crisis, this aspect of cyber security became even more critical with employees handling sensitive data all over the world working remotely. This complicates the process of tracking down the sensitive data (at rest, in transit, and in use) and protecting it.

So, handling Public Key Infrastructure (PKI) remotely became critical for the revocation of short-lived certificates and managing the existing, live certificates. Also, managing PKI remotely is highly critical for compliance purposes, as there might be huge penalties companies have to face for non-compliance with several international standards. Public Key Infrastructure (PKI) can be leveraged for protecting and performing email, VPN, user authentication, and website certificate management. PKI has become a business-critical asset for organizations with a distributed or hybrid workforce.

What is PKI?

PKI, or Public Key Infrastructure, is a cybersecurity technology framework that protects client – server communications. Certificates are used for authenticating the communication between client and server. PKI also uses X.509 certificates and public keys for providing end-to-end encryption. In this way, both server and client can ensure trust in each other and check their authenticity to prove the integrity of the transaction. With the increase in digital transformation across the globe, it is highly critical to use Public Key Infrastructure for ensuring safe and secure transactions. PKI has vast use cases across several sectors and industries, including the Medical and Finance fields.

Explore the complete information about Public Key Infrastructure here:

PKI Fundamentals – Knowing the Modern PKI

What are important components in Public Key Infrastructure?

There are three key components: Digital Certificates, Certificate Authority, and Registration Authority. PKI can protect the environment using the three critical components. These components play a crucial role in protecting and securing digital communications and electronic transactions.

• Digital Certificates: The most critical component in Public Key Infrastructure (PKI) is Digital certificates. These certificates are used to validate and identify the connections between server and client. This way, the connections formed are very secure and trusted. Certificates can be created individually depending on the scale of operations. If the requirement is for a large firm, PKI digital certificates can be purchased from trusted third-party issuers.
• Certificate Authority: A Certificate Authority (CA) provides authentication and safeguards trust for the certificates used by the users. Whether it might be individual computer systems or servers, the Certificate Authority ensures the digital identities of the users are authenticated. Digital certificates issued through certificate authorities are trusted by devices.
• Registration Authority: Registration Authority (RA) is an approved component by the Certificate Authority for issuing certificates for authenticated users based on requests.  RA certificate requests range from individual digital certificates to sign email messages to companies planning to set up their own private certificate authority. RA sends all the approved requests to CA for certificate processing.

That should have given you a good answer to the question: how does a PKI work? Now let’s learn why you should scale your PKI remotely.

Why should firms worry about scaling PKI remotely?

COVID-19 has not only created a health crisis across the globe, but it also created havoc in cyberspace, creating a cyber pandemic as well. There has been a multi-fold increase in the number of cyber-attacks right from the start of the COVID-19 pandemic. Cyber-criminals are exploiting the current situation of remote working facilities of employees and newly deployed remote access solutions for cyber-attacks. Numbers suggest that during the initial days of the global pandemic, there was an increase of 33% in the volume of cyber-attacks. Recent attacks on one of the largest gas pipelines and a meat supplier suggest that even major firms with huge infrastructures are not immune to these attacks.

Why use PKI?

There are several good traditional cyber security mechanisms, such as multi-factor authentication and password-based protection, implemented for securing sensitive data remotely, but these techniques are no longer foolproof, with cyber criminals easily manipulating the aforementioned mechanisms and breaching secured walls. Cybercriminals are able to breach these techniques, so many cybersecurity research organizations are suggesting moving away from these approaches. Leveraging Public Key Infrastructure to implement certificate-based authentication provides better security for sensitive data when compared to traditional approaches.

How can you leverage Public Key Infrastructure (PKI) remotely?

Public Key Infrastructure (PKI) can provide better and stronger security standards when compared with password-based protection or multi-factor authentication, which are often in use for protecting sensitive data. As several research firms, like Forrester and Gartner, say, it is always preferred to go with a “Zero Trust Security Model” to reduce the risk of exposing your business and employees. PKI can be one of the most important layers in achieving a “Zero Trust” strategy. There are three critical steps that can be followed by your organization to scale Public Key Infrastructure remotely to protect data spread across different locations:

1. PKI certificate-based authentication can be used to replace traditional password-based protection.
2. PKI certificate authentication can be used to replace traditional multi-factor authentication.
3. Automation of identity certificate management can also be implemented.

PKI Certificate-based authentication vs. password-based protection

As per the “Data Breach Investigations 2019 report by Verizon”, 62% of breaches are caused by either phishing, stolen credentials, or brute force. From this research data, we can deduce that the majority of data breaches involved password leakage either willingly or by accident, or they were done through hacking techniques, such as brute force attacks, which makes this protection technique more vulnerable.

On the other hand, PKI-based user identity certificates used in certificate-based authentication can be considered one of the strongest forms of identity authentication. This also eases the process for employees, as they are not required to remember and update passwords frequently. In certificate-based authentication, digital certificates are used for user authentication.

Reasons why PKI-based authentication is better:

• The private key is used for authentication, which can always reside in the client environment.
• Private Key/Certificates cannot be stolen in transit or at rest (in server repositories).
• Unlike passwords, digital certificates can take several years to decrypt using brute force attacks.
• There is no requirement to remember or frequently change digital certificates like passwords.

PKI certificate authentication vs Traditional multi-factor authentication

It is a known fact that multi-factor authentication, either via a hardware token device or mobile SMS/call-based authentication, will provide additional security when compared to only using password-based protection. Unfortunately, this is a cumbersome process for employees as there are extra steps involved in going through the authentication cycle. PKI certificate-based authentication will help in eliminating this extra step and still be able to provide stronger data security.

Advantages of using PKI certificate authentication over traditional multi-factor authentication are:

• Employees need not worry about carrying and securing extra hardware tokens or devices for additional security.
• The extra step of entering a secure token ID or One-time password (OTP) can be avoided.
• Connected devices can be trusted and authenticated.
• Using PKI certificate authentication, you can achieve several use cases for multiple entities such as users, machines, and devices (mobile).
• Using PKI, you can satisfy multiple use cases such as user authentication, machine authentication, Windows logon, accessing corporate emails, and VPN access, to name a few.

Automation of identity certificate management

The final step in scaling PKI remotely is to automate the process of certificate management. This will reduce the burden on IT staff by eliminating the intensive process of certificate deployment, renewal, and revocation. This will help IT staff quickly replace or revoke certificates.

Benefits of automating certificate lifecycle:

• Certificate discovery: Performing discovery activity to identify certificates in use across the business landscape.
• Certificate Deployment: Automated issuance of certificates and installation.
• Certificate Review: Automatically renew the certificates wherever necessary and revoke them if they expire.

Decision Matrix: Choosing How to Scale PKI Remotely

Use Case	Security Impact	Operational Effort	Automation Fit	Recommended Owner
Replace password-based login with PKI certificates	High	Medium (initial rollout)	High	Security architects, platform teams
Replace traditional MFA with PKI certificate authentication	High	Medium (initial rollout)	High	Security architects
Automate certificate discovery, deployment, and renewal	High	Low once automated	Very High	PKI administrators
Continue password + traditional MFA only, no PKI	Low	Low	Low	Not recommended; flag to CISO/compliance as a risk

Encryption Consulting’s Managed PKI’s

Encryption Consulting LLC (EC) will completely offload the Public Key Infrastructure environment, which means EC will take care of building the PKI infrastructure to lead and manage the PKI environment (on-premises, PKI in the cloud, cloud-based hybrid PKI infrastructure) of your organization.

Encryption Consulting will deploy and support your PKI using a fully developed and tested set of procedures and audited processes. Admin rights to your Active Directory will not be required, and control over your PKI and its associated business processes will always remain with you. Furthermore, for security reasons, the CA keys will be held in FIPS 140-2 Level 3 HSMs hosted either in your secure datacentre or in our Encryption Consulting datacentre in Dallas, Texas.

Certificate Lifecycle Management and PKI Modernization

Scaling PKI remotely depends on the same certificate discovery and automation capabilities that support any large-scale PKI modernization effort. CertSecure Manager automates certificate discovery, issuance, and renewal across a distributed device population, closing the gap that causes outages and manual errors during large-scale certificate-based authentication rollouts.

Organizations that need to scale PKI without operating it entirely in-house can rely on PKI-as-a-Service for cloud-hosted PKI modernization that scales with a growing remote or hybrid workforce. Before a large certificate-based authentication rollout, it is worth building a machine identity inventory through CBOM Secure and completing a PQC readiness assessment, so certificate discovery for remote authentication also builds crypto agility for the post-quantum transition. Encryption Consulting’s PQC Center of Excellence provides guidance on sequencing these initiatives together.

For more on why certificate automation matters across the environment, see our Education Center articles on the stages in a certificate’s lifecycle and how to avoid certificate outages.

Measuring Success and Ongoing Audits

Track the percentage of remote users and devices authenticated via PKI certificates versus password or traditional MFA, the number of certificate-related authentication failures, and whether certificate discovery and renewal are fully automated. Audit certificate issuance logs, remote access authentication logs, and certificate expiry dashboards on a quarterly basis for policy-driven factors, and continuously for certificate expiry to keep the remote PKI rollout from causing an authentication outage.

Frequently Asked Questions

What is the main takeaway from Your Guide To Scaling PKI Remotely?

Scaling PKI remotely means replacing password and traditional MFA-based authentication with PKI certificate-based authentication, then automating certificate discovery, deployment, and renewal so the rollout doesn’t create a new operational burden.

Why does this matter for enterprise PKI teams?

PKI teams are directly responsible for scaling certificate issuance capacity, discovery, and renewal to match a distributed remote or hybrid device population without causing authentication outages.

What risks increase if this topic is handled manually?

Manually managing certificates for a distributed workforce increases the risk of missed renewals, inconsistent enrollment across remote devices, and slower response when a certificate needs to be revoked for a compromised or departing employee.

Which teams should own this change?

Security architects design the migration from password/MFA to certificate-based authentication, PKI administrators scale issuance and automation, platform teams own device onboarding, and compliance teams verify the rollout meets applicable requirements.

How does this connect to certificate lifecycle management?

Every remote device migrated to certificate-based authentication adds another certificate that must be issued, renewed, and revoked. Scaling PKI remotely is only sustainable if it is treated as part of the same certificate lifecycle management program as every other certificate type.

How should organizations measure success?

Track the percentage of remote users and devices on certificate-based authentication versus password or MFA, the number of authentication failures tied to certificates, and whether certificate discovery and renewal are fully automated.

What should be audited or monitored regularly?

Regularly audit certificate issuance logs, remote access authentication logs, and certificate expiry dashboards to catch renewal failures before they disrupt remote access.

How does this topic affect cloud, hybrid, or multi-CA PKI?

Organizations with hybrid or multi-CA PKI need remote-issued certificates to be trusted consistently across every issuing CA and access point, which requires centralized certificate discovery and a consistent trust chain across the environment.

What common mistakes should teams avoid?

Common mistakes include rolling out certificate-based authentication without automating renewal, leaving some remote devices on legacy password authentication indefinitely, and not scaling issuing CA capacity to match the size of the remote device population.

What should be refreshed quarterly?

Review the remote device inventory for new endpoints needing certificate-based authentication, confirm certificate expiry timelines against the current CA/Browser Forum validity schedule, and re-verify no devices have reverted to password-only authentication.