The lifecycle of digital certificates was a major theme in 2024. Just as organizations began to more readily accept the eventuality of a 90-day lifecycle for TLS and SSL certificates, another major browser announced a plan to reduce lifecycles to 45 days by 2027 at a Certificate Authority/Browser (CA/B) Forum meeting in October. Not long after, the lifecycle was modified to 47 days.  

This shift represents a significant change in how businesses must handle their certificate management — and an even greater challenge for smaller businesses attempting to keep up with manual renewal. The increased frequency of renewal demands more time and effort and heightens the risk of human error. Ultimately, the sheer number of certificates, all based on public key infrastructure (PKI), that will require oversight on such a frequent basis will become unmanageable for any company as these lifecycles get compressed. This will happen especially quickly for small- to medium-sized enterprises. 

Arguments for Shorter Validity Periods 

The arguments for certificate lifecycle changes stem from the notion that shorter validity periods will ensure domain ownership information remains accurate and up-to-date, as long as certificates are renewed on time. This, in turn, reduces the risk of breaches or compromises from outdated encryption. Additionally, by reducing the time a certificate is valid, it could be argued that organizations will be more inclined to stay vigilant about their certificate management, as they will need to address their certificates more frequently. This could reduce the likelihood of breaches caused by stale or mis-issued certificates.  

However, there is concern that the shift introduces significant logistical challenges, particularly for smaller enterprises that may lack the resources to manage frequent renewals manually. Additionally, no guarantee reducing certificate lifecycles will reduce security incidents. It is simply an approach that browsers and others in the industry are taking. It may be successful, or it may not. Time will tell what the marginal impact of reducing validity periods will be in making the internet safer.  

Logistical Challenges for Businesses 

The increased frequency of renewals places tremendous pressure on IT, PKI, security and DevOps teams to stay on top of certificate expirations, especially smaller teams and businesses. Manually tracking and renewing hundreds to thousands of certificates every few weeks will become a stressful and error-prone ordeal — if it is even possible at all.  

One of the primary challenges is the sheer volume of certificates that need to be managed. As the number of digital certificates grows, so does the risk of certificate-related outages. These outages can lead to service disruptions, loss of revenue and represent significant security and reputational risk for a company. As the frequency of renewals increases, IT teams will need to constantly monitor expiration dates and ensure timely renewals. This will significantly drain their resources from other tasks and may eventually reach a point where it is simply not possible to renew certificates on time while performing other critical duties. 

The more pressure this creates, the higher the risk of manual error. Mistakes in the renewal process, such as missed deadlines or incorrect configurations, can lead to expired certificates and subsequent service outages.  

Managing this while maintaining compliance with industry standards and regulations further complicates matters. Businesses must ensure that their certificate management processes meet the required security standards, which can be challenging without the right tools and expertise. This adds yet another layer of complexity to an already demanding task. 

The Role of Automation in Certificate Management 

Given the logistical challenges associated with shorter certificate lifespans, the only way companies will be able to keep pace with their certificates is through automation. Automating certificate lifecycle management streamlines the entire renewal process — from tracking impending expirations to notifying the right people, performing domain control validation (DCV), getting the certificate issued and re-provisioning certificates to the correct endpoint.  

By implementing automated solutions, organizations can keep up with the rapidly changing digital landscape without compromising their operations, while also staying on top of active certificates that may be out of compliance or company policy. While businesses will need to automate, this does not necessarily mean it is easy to integrate automation platforms into existing systems, nor that all automation solutions can meet the scale of a business’s needs. Therefore, there is a clear need for scalable, easy-to-integrate automation platforms that businesses can use to swiftly alter how they provision their certificates.  

The ACME Protocol and Automation Platforms 

An automation platform that has seen significant success is the automatic certificate management environment (ACME) protocol. ACME is an open-source protocol that automates the issuance, renewal and revocation of certificates, making it easier for businesses to manage their digital certificates without manual intervention. It is particularly beneficial for smaller enterprises that may lack the resources to manage certificates manually. 

How ACME Works 

ACME automates the interactions between certificate authorities (CAs) and web servers, ensuring that certificates are issued and renewed without manual intervention. Here is a step-by-step breakdown of the ACME process: 

1. Download ACME Client: The user downloads and installs an ACME client. 

1. Account Registration: The user registers an account with the CA, providing contact information and agreeing to the terms of service. 

1. Domain Validation: The client proves control over the domain by responding to challenges issued by the CA. Common methods include HTTP-01 (placing a file on the web server) and DNS-01 (adding a DNS record). 

1. Certificate Request: Once domain control is verified, the client submits a certificate signing request (CSR) to the CA. 

1. Certificate Issuance: The CA issues the certificate, which the client then installs on the server. 

1. Renewal: The client periodically repeats the validation process to renew the certificate before it expires. 

By understanding and implementing the ACME protocol and similar tools, businesses can effectively manage the logistical challenges posed by shorter certificate lifecycles, enhancing both security and operational efficiency. While implementing the technology and training may require some effort, the long-term benefits of reduced risk and increased efficiency make it a worthwhile endeavor.