Why Choose Software for Certificate Scanning Over Manual Methods?

Certificate scanning is the process of monitoring digital certificates across a network to confirm their validity, configuration, and expiration, and software-based scanning outperforms manual methods on speed, accuracy, and scale.

Software-based certificate scanning outperforms manual methods because it continuously discovers certificates across an entire network, extracts expiration and configuration details automatically, and alerts teams before problems occur. Manual scanning depends on individually checking certificates with command-line tools and spreadsheets, which does not scale and is prone to missed renewals as certificate counts grow.

Key Takeaways

• Manual scanning breaks down as certificate counts grow. Individually verifying each certificate with OpenSSL and manually logging results is workable for a handful of certificates, not hundreds.
• Automated discovery finds certificates manual scans miss. Network scanning surfaces hidden or infrequently accessed systems that a manual inventory effort tends to overlook.
• Real-time alerts replace error-prone manual reminders. Automated systems notify teams before expiration; manual reminders depend on someone remembering to set and check them.
• The 2018 Ericsson outage is a documented case for automation. Manually managed, unalerted certificates in core network software caused a multi-country outage; Ericsson moved to automated certificate lifecycle management afterward.
• Automation frees security teams for higher-value work. Removing manual certificate verification does not replace security staff; it shifts their time to the parts of the job that need human judgment.

Why Manual Certificate Scanning Falls Short

Manual scanning requires several labor-intensive steps that each introduce their own chance of error.

• Risk of missing systems entirely. Manually listing every server, application, and device using certificates risks leaving out something that later causes an unencrypted exposure.
• Time-consuming verification. Checking each certificate individually with OpenSSL or similar tools does not scale across a large network.
• Manual data entry. Certificate details must be entered into a tracking system by hand, introducing the risk of typos in dates that matter.
• Reminder-dependent renewal. Calendar alerts are only as reliable as the person who set them and remembers to act on them.
• Delayed reporting. Manually compiled status reports take time to produce and can be out of date before they reach the team that needs them.

How Automated Certificate Scanning Works

Automated scanning covers the same ground as manual methods, but continuously and without the same failure points.

1. Discover. Network and port scanning locate every certificate across servers, devices, and cloud environments, including ones a manual process would overlook.
2. Gather information. The software automatically extracts issuer, expiration date, and security configuration details for each certificate found.
3. Track continuously. Instant alerts fire for expiring certificates, deprecated algorithms, or mismatched issuer details as conditions change.
4. Report. Automated reports and dashboards give a real-time view of certificate health across the organization.
5. Remediate. The system can initiate renewal directly or integrate with existing certificate management and CA systems to automate deployment.

Common Concerns About Automated Scanning

Four concerns come up most often when organizations consider moving away from manual certificate tracking.

• Upfront cost. Implementation has a real cost, but it is typically far lower than the cost of a service outage or breach caused by an expired certificate.
• Setup complexity. Modern solutions are designed to integrate with existing infrastructure, and most vendors support the initial rollout.
• Flexibility for unique environments. Most automated tools offer configuration options tailored to specific organizational requirements.
• Staff displacement. Automation removes manual verification work, not security judgment; teams shift toward higher-value tasks rather than being replaced.

Why is the Manual Approach Not Preferred?

The manual approach to certificate management is not ideal due to several key challenges and limitations. Here’s why relying on automation is a much better option: 

• Risk of Missing Out Systems

  You will have to manually list all the servers, applications, and devices that use digital certificates within your network. Missing a single device can expose your organization to various threats, such as unencrypted data transmission and increased vulnerability to interception and tampering. 

• Verifying and Viewing Certificates

  This is done manually using OpenSSL and other command line tools, which makes it very time-consuming, especially in large networks. Each certificate must be checked individually, including details such as the issuer, expiration date, and common name (CN). This manual process is not only labor-intensive but also prone to human errors.  

• Entering Data into a Database

  You will have to enter all the collected data into a database since it will not be done automatically. Manual entry increases the risk of data inaccuracies, such as incorrect expiration dates, which could result in overlooked renewals.

• Setting up Precautions

  You will have to manually set up calendar alerts or reminders to notify you of impending expirations. However, solely relying on these reminders is risky, especially when there are multiple certificates, and they all expire at different times. If any reminder or alert gets missed, then it could lead to disruptions in the smooth functioning of your infrastructure.

• Periodic Review

  You will need to set up a schedule to periodically review the spreadsheet and check if any of the installed certificates have expired. However, if this review is missed, there is a risk that an expired certificate could go unnoticed, leading to potential security vulnerabilities or service outages.

• Manual-driven Renewal

  You will have to manually initiate the renewal process for expired certificates to ensure that all expired certificates are updated in the system. However, if this step is missed, expired certificates will continue to be used, which could result in security breaches, service interruptions, and potential non-compliance with industry standards.

• Vulnerability Assessment

  You will have to manually assess certificates for security configurations like outdated algorithms. Manually detecting issues like weak cipher suites, protocol downgrade vulnerabilities, incomplete certificate chains, and insufficient key lengths is challenging due to their complexity and potential for oversight across multiple systems.  

• Compile Reports and Distribute Information

  You will need to manually summarize any issues found and the status of certificates in the form of a report. These reports are then shared with the IT security team for necessary actions. However, this can be a time-consuming task and prone to errors, especially when dealing with a large number of certificates. If reports are delayed or not communicated properly, it could lead to missed expirations or unresolved security issues, which may create vulnerabilities and affect the overall reliability of the system.

It is clear from the above considerations that the traditional method is extremely inefficient and time-consuming, especially for larger organizations that deal with multiple certificates. Without automation, the risk of human error increases significantly as the volume of certificates grows, making it impossible to ensure timely renewals and security compliance across the board. These manual efforts can be easily prevented with automated certificate management, as it will automatically monitor all certificates, alerting the team before any expiration occurs and allowing for smooth functioning throughout the system.   

How is Automated Certificate Scanning Different From Manual Scanning?

1. Certificate Discovery

   • Network Scanning: This will help carry out automatic certificate scanning. You will not be engaged in manual scanning of the network and making tireless efforts to produce a list of all the devices that use certificates. Rather, the software will linearly scan the whole network to locate all systems and devices that use digital certificates. Even the hidden or less frequently accessed systems that might have been overlooked during the manual process will also be listed automatically.

   • Inventory Creation: After scanning the network, it gathers all the certificates being used across the system. This inventory provides a comprehensive database of certificate details, including their locations and usage, making it easier to manage and track them efficiently.

2. Information Gathering

   • Automatic Retrieval: The system automatically extracts key details from each certificate, such as the issuer, expiration date, and security configurations, including algorithms and encryption levels, saving time and reducing the chance of human error.  

   • Central Management Interface: With automated mode, the information that is needed by the users can be more conveniently accessed using a simple layout of the central dashboard.  

3. Continuous Tracking

   • Instant alerts: As part of the system, alerts such as notifications for expiring certificates, certificates using deprecated algorithms, or mismatched issuer names. It will be triggered to warn the concerned authorities about the potential threats or security risks they are likely to be facing.  

   • Regular Scans: It will periodically analyze the entire system to update administrators on any changes made to the status of certificates. 

4. Reporting

   • Automated Reports: With automated mode, detailed reports will be generated, which offer insights into certificate health, expiration dates, compliance status, and security configurations. These reports allow teams to quickly identify areas that may need attention, such as certificates nearing expiration or those failing compliance checks. 

   • Summary Dashboards: Graphical dashboards give a quick overview of the number and status of certificates present in the system.  

5. Remediation

   • Renewal Process: It can initiate renewal processes for expiring certificates or prompt administrators to act before anything goes wrong.

   • Integration with Systems: Some of the solutions available in the market today also integrate with existing management and certificate authority systems, enabling the automation of certificate deployment and renewal processes across your network.

Some of the solutions available in the market today also integrate with Therefore, by automating these processes, organizations can maintain better security, reduce the chances of outages, and ensure compliance with minimal manual effort.    

Key Benefits of Automation 

• Proactive Strategy

  A proactive strategy is crucial for staying ahead in a competitive environment. Organizations can maintain a strong security framework across the system by automating the certificate scanning process proactively by detecting potential issues such as expired certificates or misconfigured certificates and addressing them before they introduce any vulnerabilities.  As per the IBM Security 2020 Cost of a Data Breach Report, proactive security measures can reduce the likelihood of a data breach by up to 30%.

• Real-Time Monitoring

  Automated systems provide continuous monitoring and instant alerts for expiring or vulnerable certificates, allowing for proactive management. This helps prevent costly outages and security breaches by addressing potential problems before they escalate.

• Effectiveness

  By quickly scanning the entire network and identifying the certificates without any human intervention, it saves a huge amount of time and manual effort. 

• Centralized Management

  All certificate data is aggregated into a single dashboard using certificate scanning software, which makes it easier to manage, analyze, and navigate. This is especially helpful for large teams as they can cut down supervision, manual tracking, and chances of making mistakes. This centralized view makes it easier to manage everything as it takes a short amount of time to assess the state of the certificates and identify areas of concern, such as when some certificates are about to expire or when there are certificates that are at risk and proactively address them, which is crucial for maintaining security across a large number of assets.

• Enhanced Accuracy

  The software reduces the chances of human error by capturing every certificate detail like renewal, expiration, etc., making sure that no certificates are missed and that the data remains consistently accurate.

• Scalability

  As organizations grow, the number of certificates can increase significantly. Automated tools can scale effortlessly to handle large volumes of certificates, unlike manual methods. 

• Reporting Capabilities

  Presenting data to audit teams and stakeholders becomes easier by using automated technologies that produce thorough, customizable reports on certificate status.

• Compliance

  Many software solutions include features to ensure that the certificates meet the best practices and regulatory standards like PCI-DSS, HIPAA, NIST, and GDPR, thus simplifying compliance efforts.

• Integration

  The overall security posture can be improved by integrating a variety of certificate scanning systems with the current security tools and processes like SIEM (Security Information and Event Management) platforms, Intrusion Detection and Prevention Systems (IDPS), and Vulnerability Scanners to mitigate system vulnerabilities.

Real World Example: Ericsson’s Global Outage(2018)

In December 2018, Ericsson suffered a large-scale service outage that affected many telecommunication networks in various countries, including the UK and Japan. Ericsson later identified that the reason for this outage was the expired TLS certificates within their network. These certificates were manually controlled with little to no alert mechanisms, resulting in software failure and critical service outages. 

The outcome of this incident had a lot of effects. Millions of users lost their mobile and data services for hours. This resulted in serious inconvenience to users. Telecom operators who relied on Ericsson’s infrastructure suffered financial and reputational damage. This incident also drew severe criticism toward Ericsson. This highlighted the risks of manual certificate management within a complex and large-scale infrastructure.   

Ericsson, along with the telecom providers, acted promptly to manage certificate lifecycles using an automated system. They set up automated processes that would monitor, issue, renew, and revoke certificates from their network systems. In an attempt to reduce outages, real-time alerts of expiring certificates were introduced to notify teams so that proactive measures could be taken. Moreover, during their DevOps practice, automation was incorporated to use certificates more efficiently during deployments. 

The shift to automated management of certificates turned out to be beneficial. The risk of unnoticed expirations was eliminated, along with the assurance of uninterrupted service. This further improved operational effectiveness by freeing teams from manual tracking and allowing them to focus on strategic tasks. The enhanced visibility also improved security by addressing vulnerabilities in real time.  

This incident serves as a critical lesson on the importance of proactive and automated certificate management. It demonstrates that relying on manual processes in large-scale systems can lead to catastrophic failures, while automation ensures reliability, security, and operational resilience.   

How can Encryption Consulting Help?

A well-documented certificate management failure shows what manual tracking looks like at scale, and what changed afterward.

In December 2018, an expired certificate in Ericsson’s core network software, specifically its SGSN-MME components, triggered a nationwide outage affecting O2, Tesco Mobile, and Sky Mobile in the UK along with SoftBank in Japan. Roughly 32 million O2 subscribers lost service for close to 24 hours. The certificates involved were manually tracked with little to no automated alerting, which meant nobody caught the approaching expiration in time.

Following the incident, Ericsson and affected telecom providers moved to automated certificate lifecycle management, including real-time expiration alerts and automated renewal, to prevent a repeat failure.

Frequently Asked Questions

What is certificate scanning?

Certificate scanning is the process of monitoring digital certificates across a network to confirm their validity, expiration date, issuer, and security configuration. It can be done manually with command-line tools or automatically through dedicated scanning software.

How does automated certificate scanning find certificates that manual methods miss?

Automated tools use network and port scanning to locate every system using a certificate, including hidden or infrequently accessed devices that a manual inventory effort is likely to overlook. This comprehensive discovery is difficult to replicate by hand once a network grows past a small size.

Is automated certificate scanning worth the upfront cost?

For most organizations, yes. The cost of implementing automated scanning is typically far smaller than the cost of a service outage or security incident caused by a missed certificate expiration, which is exactly the kind of failure manual tracking is most prone to.

What caused Ericsson’s 2018 network outage?

An expired certificate in core network software, specifically in Ericsson’s SGSN-MME components, caused a nationwide outage affecting O2, Tesco Mobile, and Sky Mobile in the UK along with SoftBank in Japan, with roughly 32 million O2 subscribers affected for close to 24 hours. The certificates involved were manually tracked with little automated alerting, which is why the expiration went unnoticed until service failed.

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