Topic starter
08/06/2026 4:57 pm
TL;DR: SSH keys replace passwords with public-private cryptography, but the operational risk sits in key distribution, rotation, revocation, and visibility, according to StrongDM’s guide on RSA, DSA, and ECDSA. The real governance issue is that SSH access remains a non-human identity problem, so unmanaged keys can outlive roles, owners, and intended scope.
Editorial analysis by NHI Mgmt Group, based on content published by StrongDM: “Comparing SSH Keys: A Comprehensive Guide (RSA, DSA, ECDSA)”.
Key questions
Q: What breaks when SSH key ownership and governance are unclear?
A: When SSH key ownership and governance are unclear, organisations lose visibility into who can access critical systems and why.
Q: Why do long-lived SSH keys increase access risk even when the algorithm is strong?
A: Because cryptographic strength does not remove trust debt.
Q: What are the signs that SSH key management is failing in an enterprise?
A: Common warning signs include large numbers of scattered keys, keys tied to application and system accounts with high privilege, and no reliable process to remove keys when accounts or applications are retired.
Practitioner guidance
- Inventory every authorised SSH key Map each public key to an owner, system, and intended access scope, then remove keys that cannot be attributed to a current business purpose.
- Tie key revocation to lifecycle events Make offboarding, role change, and system retirement trigger SSH key removal from authorised_keys and any central trust store.
- Reduce reused key trust scope Prohibit the same SSH key from being trusted across unrelated environments unless there is a documented operational need and explicit approval.
Bottom line: SSH key algorithm comparisons are useful, but they do not solve the governance problem created by unmanaged distribution, reuse and revocation.
Explore further
View Full Forum → | NHI Foundation Course → | Our Services → | Read the full analysis →
This topic was modified 4 days ago by NHI Mgmt Group
08/06/2026 6:52 pm
SSH keys are a non-human identity governance problem, not just a cryptography choice. The article compares algorithms, but the operational failure mode sits in the lifecycle of the key after issuance. Ownership, distribution, authorised locations and revocation timing determine whether the key still represents a valid entitlement. Practitioners should read SSH access as NHI governance with cryptography as only one input.
A few things that frame the scale:
- 97% of NHIs carry excessive privileges, increasing unauthorised access and broadening the attack surface, according to the Ultimate Guide to NHIs.
A question worth separating out:
Q: How should teams compare SSH key management with privileged access management?
A: SSH key management covers the credential itself, while privileged access management covers the entitlement and oversight around what that credential can reach. Teams need both. A strong key can still be overprivileged, and a well-scoped entitlement can still be undermined by weak key lifecycle control.
👉 Read our full editorial: SSH key comparison exposes the governance gap in access management
This post was modified 4 days ago by NHI Mgmt Group