Certificate Discovery: How to Find Every Certificate Across Your Enterprise
Introduction: What Is Certificate Discovery?
The certificate discovery process involves searching your network, cloud, and devices to locate all the digital certificates you own. You can search for certificates, store them in a single location, and keep records of who owns each one and its expiration date. This helps prevent unexpected outages due to lost certificates.
This guide will teach you the importance of certificate discovery as well as the location of hidden certificates. You will also learn how to find all certificates in your network and how to track certificate expiration dates across the enterprise. So let’s begin with the fundamentals.
What Is Certificate Discovery in Simple Words?
Imagine a digital certificate as an ID card in the digital world. It is proof of the authenticity of a website, server, or device. There are thousands of these cards owned by large companies. Many of them are in areas no one expects to find.
Certificate discovery would be similar to a headcount. A discovery tool is used to locate all certificates on your systems. Then it notes important information in one list, which is known as an inventory.
A good inventory will provide:
- The certificate’s name and its location.
- The owner and the team in charge.
- The organization that issues the certificate (also known as Certificate Authority or CA).
- The expiration date
- The kind of certificate and its settings.
If you aren’t aware of a certificate, then you cannot protect it. That is why the first step in any good security plan is to find out, “What certificates do you have?”
Why Certificate Discovery Is Important
Why certificate discovery is important is as simple as the word risk. An unknown certificate may expire at any time without notice. If that occurs, a website or app may cease to function.
Here are the top five reasons why it’s important to practice certificate discovery.
1. It Prevents Outages
When a certificate expires, a website, app, or login system can break. A security warning is displayed, and many customers exit. With Discovery, you will know all the expiration dates in advance.
2. Reduces security risks
Old, weak, or unapproved certificates provide an easy entry point for attackers. With the help of certificate discovery, you can easily identify them and replace them in no time.
3. It Makes Audits Easier
Auditors request evidence of control of certificates. With a full inventory, you’ll have that proof in minutes, not days.
4. It Saves Time
During an emergency, teams spend hours looking for one certificate. A clear inventory takes that stress away.
5. It helps you get ready for shorter life spans.
The duration of public certificates has been shortened. The CA/Browser Forum set the maximum life of a public certificate at 200 days. That limit drops to 100 days in 2027 and 47 days in 2029. This way, your team will renew certificates much more frequently. The higher the numbers, the more likely it is to miss one.
Where Do Hidden Certificates Live?
Most enterprises have more certificates than they think. They are developed by teams for tests, new projects, and quick fixes. Then people leave or forget about them. Experts call these forgotten certificates “shadow certificates.”
Here are the common places to look:
- Public websites and web servers: the most visible spot
- Internal apps and APIs: often missed because customers never see them
- Cloud platforms: teams can create certificates in minutes
- Containers and Kubernetes: certificates appear and vanish quickly
- Load balancers and firewalls: they hold certificates that people rarely check
- Laptops, phones, and IoT devices: each device may carry its own identity
- Private CA systems: internal authorities issue certificates with no public oversight
Different teams own different parts of this list. As a result, nobody sees the whole picture. Certificate discovery fixes that problem.
How to Find All Certificates in Your Network
So, the big question is how to find all certificates in your network. Use the six steps below.
- Set your scope. List your networks, cloud accounts, and device groups.
- Choose your scan methods. Use network scans, cloud connections, and CA connections together.
- Run the first scan. Search for certificates on all open ports, including non-443.
- Collect the details. Record the owner, issuer, type, key size, and expiry date.
- Eliminate duplicate results and sort the results. Organize certificates into groups by risk, team, and expiration date.
- Re-scan regularly. New certificates are issued daily, so it’s never enough to scan once.
How to Find All SSL Certificates in an Enterprise
Many readers ask, “How to find all SSL certificates in an enterprise?” The most popular certificates are SSL/TLS certificates, so they are worth a special mention. Apply three techniques simultaneously:
- Network scanning: Probe IP ranges and ports to find certificates on live systems.
- Get a list of certificates that your CAs issued to you.
- Certificate Transparency logs: These public logs are used to track certificates that are issued for your domain names. They can show you certificates your team didn’t know about.
Each method will trap what the others will not. Therefore, a strong certificate discovery will use all three.
Want to know which types to look for? Check out our guide on digital certificate management and the certificate types your enterprise needs to track.
Make Certificate Discovery Easy with AppleShine Tech
Manual scans are time-consuming and are not up-to-date. Thousands of certificates cannot be stored in a spreadsheet. This is where AppleShine Tech can help.
Our certificate lifecycle management service helps enterprises find, track, and renew certificates all from one place. You get visibility over all certificates, their owner, and their expiration date. Furthermore, there are fewer last-minute renewals and rushed repairs.
The advantages you get:
- All your certificates in one place.
- Notifies you when certificates are expiring.
- Less manual work for your security team.
- Create reports for audits as required.
See the service page for details of how it works in your configuration.
How to Track Certificate Expiration Dates Across the Enterprise
Finding certificates is only half the job. Next, you must watch them. Here is how to track certificate expiration dates across the enterprise.
Create a single inventory.
Maintain one list of all certificates. Don’t have individual spreadsheets for each team. Gaps are concealed in separate lists.
Have an owner for each certificate.
All certificates must have an owner. If there is no one, no one is responsible for the renewal. Update the owner when people change roles.
Set Alerts Early
Send warnings ahead of time before each deadline. Many teams use alerts at 90, 60, 30, and 7 days. Select the schedule that is appropriate for your renewal process.
Automate Renewals Where You Can
Automation eliminates human error, a major source of expiry issues. Work on the most critical systems first.
Check Your Inventory Frequently
Repeat the scan once a month or once a quarter. Then compare the results with your list. It’s a good idea to check any new certificate you didn’t expect.
To learn how each stage of the certificate lifecycle works, read our guide on certificate lifecycle management: importance, stages, and best practices.
Common Certificate Discovery Mistakes to Avoid
Even the most careful teams make these mistakes:
- Only public websites are scanned. There are also many certificates stored in internal systems.
- Scanning only once. There are new certificates added all the time.
- Skipping ownership details. An unowned certificate will expire without anyone knowing.
- Ignoring private CA certificates. They are often forgotten by teams as they have no public rule that limits their life.
- Relying on spreadsheets. They go out of date quickly.
Conclusion
Certificate discovery is used to locate all certificates throughout your network, cloud, and devices. It is an outage prevention, risk reduction, and audit tool. Certificate lifespans are getting shorter, and you can’t afford blind spots.
Be clear about scope and use multiple scan methods simultaneously. Then, create one inventory and assign an owner to each certificate. Last but not least, create alerts and schedule your scans.
Looking to view all certificates in your enterprise? Explore our certificate lifecycle management solutions, and share your questions in the comments below.
FAQs About Certificate Discovery
What is certificate discovery?
Certificate discovery is the process of scanning your systems to find all digital certificates. It builds a list that shows each certificate, its owner, and its expiry date.
How often should you run certificate discovery?
Run it on a regular schedule, such as monthly or quarterly. Many teams also run continuous scans, because new certificates appear all the time.
Can certificate discovery find private CA certificates?
Yes. A good discovery tool connects to your internal CAs and scans internal networks. This finds certificates that public scans cannot see.
What happens if you miss a certificate?
The certificate may expire without warning. Then a website, app, or service can go offline, and customers may lose trust in your brand.
What is the difference between certificate discovery and certificate monitoring?
Discovery finds the certificates you have. Monitoring watches them over time for expiry, weak settings, and changes. You need both.