Sectigo Blog

Post-quantum cryptography (PQC) is often described as an algorithm swap, but the 2026 State of Crypto Agility Report shows why the change reaches much further. Seventy-eight percent (78%) of IT and security leaders believe today’s public key infrastructure (PKI), one of the most widespread applications of cryptography today, will need to change to a great or very great extent to support PQC.

In 2025, organizations were largely preparing for shorter certificate lifespans and the future transition to PQC. In 2026, both are becoming active operational priorities. As organizations move from awareness to implementation, the scale of the work ahead is becoming clearer across cryptographic discovery, automation, architecture, governance, and investment.

Today's consumers have high expectations. Widespread phishing and spoofing campaigns make it difficult to determine which emails are legitimate, especially when receiving welcome emails or other messages from unfamiliar senders. Recipients often respond by searching for cues to separate legitimate emails from fraudulent messages.

It takes more to earn the attention of today's skeptical user or subscriber. Brands that establish credibility can stand out more clearly in the inbox, strengthening trust and supporting longer-term customer relationships.

Email authentication provides the technical foundation for building trust. Technical frameworks help receiving systems verify authorized sending, confirm message integrity, and enforce policies for messages that fail authentication. These processes support deliverability for legitimate emails while helping protect sending domains and recipients against spoofing and impersonation.

The validity periods for digital certificates are determined by their accepting organizations and always conform to the requirements given by the CA/Browser Forum, a voluntary group of certification authorities (CAs), vendors of Internet browser software, and suppliers of other applications that use X.509 v.3 digital certificates for SSL/TLS, code signing, and S/MIME. Sectigo is an active participant in the CA/B forum and helps shape the standards that govern digital certificate lifespans and trust requirements.

Certificate lifespans have been reduced multiple times over the years as part of industry efforts to improve security and limit risk exposure, and they are scheduled to shorten again. When software or a website presents an expired certificate, it can no longer be authenticated and is rejected by browsers and clients, often resulting in outages, service disruptions, and loss of user trust. Understanding certificate validity periods helps organizations plan renewals in advance and reduce the risk of avoidable downtime.

SSL certificates expire to enhance security, comply with evolving regulations, and encourage timely updates. Shorter validity periods, soon to be 47 days, improve cybersecurity by ensuring frequent renewals, minimizing risks associated with outdated encryption. Automating these renewals mitigates the increased workload and human error, making it crucial for businesses to adopt automated certificate lifecycle management for enhanced security and compliance.

Automating SSL certificate renewals is essential for businesses of all sizes to avoid outages and security risks associated with expired certificates. The renewal process can be complex and time-consuming, especially for organizations with large or intricate IT infrastructures. With upcoming changes reducing SSL certificate validity periods to 47 days, the need for efficient renewal processes is even more critical. Automated SSL renewal solutions offer significant benefits, including preventing expirations, saving time, and ensuring accuracy. Sectigo’s Certificate Manager Pro provides a comprehensive, automated solution to manage and renew SSL certificates seamlessly, enhancing security and reducing administrative burdens.

SSL/TLS certificates play a crucial role in securing web communications for organizations. It's imperative for businesses to adhere to industry standards and requirements, especially regarding certificate renewals. Recent trends indicate a shift towards shorter validity periods, driven by security enhancements. However, this change necessitates increased time and resources for renewal efforts. To mitigate risks and streamline the process, automated certificate lifecycle management (CLM) tools offer valuable assistance. In this article, we delve into the implications of shorter validity periods for SSL/TLS certificates and provide guidance for SMBs to enterprise-level organizations on preparation strategies.

Merkle Tree Certificates could reshape certificate operations as certificate lifetimes shrink and post-quantum signatures grow. Learn why automation, visibility, and crypto-agility are becoming increasingly important.

Manual certificate management is becoming increasingly difficult to sustain. Spreadsheets and hands-on renewals have long posed inefficiency challenges, but with that inefficiency comes added security risks. As the volume of digital certificates in use grows, and public SSL/TLS lifespans have started shrinking toward a 47 day maximum in 2029, manual workflows create more opportunities for missed renewals, misconfiguration, and other preventable gaps.

Cybersecurity Awareness Month is a reminder to look for practical ways to reduce preventable cyber risk. Certificate management is one area where replacing repetitive, error-prone manual processes with automation and greater visibility can support that goal.

When certificate processes are automated, organizations can improve efficiency while helping maintain consistent certificate coverage, configuration, and policy enforcement.

Every October, Cybersecurity Awareness Month provides a reminder of the growing number of digital threats and motivation to tackle these challenges proactively. Federal agencies and industry leaders come together to help individuals and organizations understand today's top risks and opportunities. The 2026 theme, “Securing the Next 250,” reinforces that forward-looking approach by encouraging stronger security practices that can build a more secure digital future.

Digital certificates are an important part of that effort, supporting online security through authentication and encryption. As organizations increasingly rely on certificates across their digital infrastructure, keeping that trust current becomes an important part of reducing cybersecurity risk. 

Phishing remains a growing threat. The Anti-Phishing Working Group (APWG) identified 3.8 million unique attacks in 2025, showing just how widespread these schemes have become. Cybersecurity Awareness Month emphasizes the importance of recognizing and reporting phishing, while organizations also have an important role to play in making legitimate communications easier to authenticate and recognize.

Phishing has become more convincing, making traditional warning signs harder to rely on. Training and awareness still matter, but technical safeguards and trust signals can give recipients additional ways to distinguish legitimate brand communications from impersonation attempts.

Email remains a top form of outreach and a great way to connect brands and consumers. By combining authentication with visible brand signals, organizations can help protect recipients, make legitimate messages easier to recognize, and build brand trust.