GaraSign: An Integrated Security Platform For The Enterprise

No. When you deploy GaraSign, cryptographic keys are never exported from the HSM or key manager. The keys are generated and stored in a non-exportable state within the cryptographic device.

Clients are restricted to proxied key access, meaning that clients make their cryptographic requests via GaraSign. GaraSign then authenticates and authorizes the client according to the policy in place, interfaces with the HSM to perform the cryptographic operation on the client's behalf, and returns the finalized cryptographic data to the client.

GaraSign is deployed on customer-managed infrastructure and can run on-premises, in the cloud, or in a hybrid environment. All types of infrastructure are supported.

No. GaraSign is licensed to customers and deployed on fully customer-managed infrastructure, so the Garantir team never has access to your keys or data.

GaraSign integrates with Thales Luna HSMs, Entrust nShield HSMs, HashiCorp Vault, AWS KMS, AWS CloudHSM, Google Cloud KMS, and Azure Key Vault. New integrations are added frequently so check in with the Garantir team if your HSM or key manager is not listed here.

Although GaraSign introduces an additional network hop in the architecture, the overall data sent over the network is drastically reduced via techniques like client-side hashing and enveloped encryption.

With client-side hashing, signing clients compute the hash of the data they wish to sign locally, then send the hash over the network to GaraSign, which finalizes the signature by applying the private key in the cryptographic device to the hash. This keeps the data sent over the network to a minimum, regardless of the size of data being signed.

While it is technically possible to have clients interface directly with the HSM, deploying GaraSign brings several major benefits that would otherwise be very difficult to achieve.

First, GaraSign integrates with all major tools and platforms to ensure a fast and easy deployment. Clients are only required to interface with GaraSign (rather than the HSM), and GaraSign provides a multitude of native client integrations, so the solution works end-to-end without any custom development work.

Second, because clients interface with GaraSign, it becomes much easier to enforce granular security controls, like multi-factor authentication, device authentication, approval workflows, notifications, and more, that might not be possible with the HSM alone. GaraSign supports all of these granular access controls for a wide range of use cases. Policies can be established and enforced on a per-key or per-user basis with a few clicks from the GaraSign admin interface.

Third, not all HSMs and key managers allow for granular access to different keys. In some cases, if you have access to a slot on the HSM, then you have access to all keys on that slot. With GaraSign, more granularity is possible.

Strictly speaking, GaraSign does not enable new use cases for the HSM. Technically, an HSM can be used to secure any kind of cryptographic key. The trouble is using the keys at speed and at scale from existing workflows without needing to export them from the HSM. This is where GaraSign comes in.

Because GaraSign provides all of the necessary native client integrations and ensures extremely high performance, it becomes practical to use an HSM to secure the keys for new use cases that aren’t typically considered appropriate for an HSM. An example will help illustrate this point.

Suppose you begin storing the SSH keys used to access sensitive production servers in your HSM. How would authorized end-users access those keys when they needed to? Either the keys would need to be exported from the HSM to the authorized end-user’s device, which defeats the purpose of storing them in the HSM to begin with, or the enterprise would need to build custom integrations from the SSH client (e.g. PuTTY, OpenSSH, WinSCP, etc.) to the HSM. The latter is a difficult, time-consuming, and expensive project. It may also introduce vulnerabilities, as a project of this nature is generally not an enterprise’s area of expertise. If the enterprise wants to enforce granular controls like multi-factor authentication across a fleet of servers, it would require manually installing PAM modules on each and every server individually.

GaraSign provides a plethora of native client integrations, and also ensures high performance, so it becomes feasible to store the cryptographic keys for any use case in the HSM without needing to build custom integrations or modify existing processes. Because clients authenticate to GaraSign, customers can enforce granular controls like multi-factor authentication and device authentication with just a few clicks from a single interface.

All GaraSign nodes deploy in a high availability cluster. Through a combination of strong redundancy and minimal data sent over the network, GaraSign provides high assurances for uptime. Customers who desire "break glass" capabilities can configure GaraSign appropriately at deployment time.

Yes, GaraSign has a documented threat model. Get in touch with the Garantir team to request a copy.

Yes, GaraSign provides certificate lifecycle management features, including issuance, revocation, renewal, CSR generation, and more. This capability is available to all customers who deploy GaraSign for at least one use case.