27 lines
1.7 KiB
Markdown
27 lines
1.7 KiB
Markdown
---
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title: Security
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sidebar_position: 50
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---
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## Application Security
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Open Technology Funds’s Security Lab partner Assured Security Consultants performed a
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[white box audit of Link](/docs/link/Assured-AB-CDR001v_CDR_Link.pdf) between October 7 and October 22, 2024.
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A white box audit provides the tester with privileged access to the source code, testing infrastructure, and
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documentation.
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The audit included the Link application itself, its integrations with chat networks Signal and WhatsApp, as well as the
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deployment and hosting infrastructure underlying a typical Link instance. Auditors performed a verification test in
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December 2025 to validate fixes and mitigations in response to the original test.
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## Infrastructure Security
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Our Link instances run on SR2's vetted-access cloud, which in turn is hosted on servers rented from Hetzner Online GmbH.
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The datacenter runs on [100% green electricity](https://cdn.hetzner.com/assets/Uploads/oekostrom-zertifikat-2025.pdf)
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and has [stringent security measures](https://www.hetzner.com/assets/Uploads/downloads/Sicherheit-en.pdf) in place to
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prevent unauthorised access.
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Hetzner holds an [ISO 27001 certification](https://www.hetzner.com/assets/downloads/ISO-Certificate.pdf) relating to
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the security measures in place, and there are no exclusions from the scope in regard to measures mentioned in Annex A.
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SR2 exclusively and manages the servers from Scotland via mutually authenticated, end-to-end encrypted channels.
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All CDR Link helpdesk data is stored on a LUKS-encrypted volume with a per-instance key to protect the data at rest.
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Hetzner staff have physical server access, but strict controls are in place to prevent unauthorised access.
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