But their strength is also their downfall.
They’re hard to track and control, and at enterprise scale, SSH keys produce millions of trust relationships – often without a clear owner, identity, purpose, or expiration date.
Admins (and sometimes even full teams) tasked with managing SSH keys struggle. Key provisioning, rotation, vaulting, de-provisioning, auditing... Admins end up dealing with massive loads of manual work and constant fear of breaking important access paths – if they remove that one 5-year-old SSH key.
This is the root cause of SSH key management sprawl and complexity.
The Zero Trust keyless access model reduces such complexity and solves the problems attached to using SSH keys, at the same time. This approach replaces permanent authorizations with ephemeral certificate-based access, reducing static credentials while strengthening security and supporting regulatory expectations.
Here’s how:
1. Scan the environment and create a map of SSH trust relationships
The first step is to scan your existing IT environment and infrastructure, mapping the existing SSH access using keys and related trust relationships. This provides visibility into how SSH keys are used across your entire environment.
Simply, you need to inventory what you have before you can migrate it to the Zero Trust keyless model.
2. Identify vulnerabilities and policy violations
Based on the assessment scan, you can identify SSH keys that are unmanaged, old, policy-violating, or grant access that should not be allowed. Here, it is important to prioritize which of such vulnerabilities need to be addressed first, meaning which of them carry the most potential risk.
3. Remediate violations and get SSH keys under control
In the next step, you address the identified violations and vulnerabilities. In large organizations that count SSH keys in hundreds of thousands or millions, this requires a dedicated and comprehensive SSH key management solution (external or built in-house) that can manage interactive and automated SSH key connections alike.
Your goal should be to create a solid SSH key management system that can help you start your migration to keyless SSH access – but remains valuable over time for discovering gaps, remediating SSH access risks, and controlling legacy SSH keys.
Check out our buyer’s guide to SSH key management and get a checklist of features and capabilities a comprehensive tool should offer.
4. Start the migration to just-in-time (JIT) ephemeral access
A good way to start your transition is to gradually move to keyless Zero Trust access with some of your most important access points.
Like that, you can protect your critical access first, closing doors to malicious actors who are potentially lurking and searching for rogue SSH keys. Therefore, making your system incrementally more impervious to attacks.
5. Follow a structured migration path with other accounts, applications, and servers
Adopting the Zero Trust model can be complicated and sometimes difficult, so structuring the migration into several phases is the recommended option. Such a hybrid approach (using both static SSH keys and Zero Trust keyless access) is a safe and flexible solution for large organizations with modern as well as legacy infrastructures.
Migrating in small numbers over time can be a solid first indicator of the reduced manual workload, which you currently need to spend maintaining SSH keys and compliance. Whether by application, account, or server, phasing the migration allows you to analyze your progress and adjust the process where necessary.
Start your Zero Trust migration to keyless access with PrivX Key Manager
Our PrivX Key Manager can help you with every step of your SSH key management journey, from scanning and assessing your environment all the way to migrating to Zero Trust keyless access.
It offers a structured path from static SSH access to just-in-time, certificate-based Zero Trust access, supporting your transition to Zero Standing Credentials. All in a single click – no need to edit scripts or make changes to applications.
On top of it all, PrivX Key Manager offers a single, centralized platform for managing legacy SSH trusts as well as certificates – with comprehensive automation, monitoring, and auditing features for full SSH key lifecycle management and beyond.
