Whitepaper, UK GDPR, Article 32

Physical Disconnection And UK GDPR

Technical whitepaper: why physical disconnection at Layer 1 is a stronger technical measure under UK GDPR Article 32 than logical isolation, and how to evidence it to the ICO, insurers and your board.

  • Offline by default
  • Identity locked access
  • Hardware encrypted
Framework matrix
Security analyst reviewing an isolated workstation with disconnected cables

Art. 32

UK GDPR security of processing, including timely restore

£17.5m

Maximum UK GDPR fine, or 4% of global turnover if higher

Layer 1

Where Offline Secure Storage® disconnects, below the network

01The requirement

Article 32 Asks For Measures Appropriate To The Risk

UK GDPR Article 32 requires appropriate technical and organisational measures, including the ability to ensure ongoing confidentiality, integrity and availability, and the ability to restore availability and access to personal data in a timely manner after an incident. Article 5(1)(f) adds the integrity and confidentiality principle. The ICO expects controllers to consider the state of the art. Logical isolation reduces exposure, but a copy that remains addressable on a network remains within reach of a compromised credential. This paper is a technical argument, not legal advice.

This is a mapping, not a certification claim. Firevault holds Cyber Essentials Plus. Everything else on this page is stated as alignment: Offline Secure Storage® produces evidence you can point at in your own submission, assessment or audit.

02What is tested

Physical Versus Logical, The Technical Argument

Each line below is something an assessor, regulator or underwriter can ask you to evidence.

Logical isolation (VLANs, firewalls, object lock) is enforced by software that can be misconfigured or bypassed

An immutable bucket is still reachable over an API with valid credentials

Physical disconnection removes the network path entirely while offline

Availability after an incident depends on a copy the attacker could not reach

Confidentiality improves when exfiltration has no route to the data

Evidence of the disconnected state is simpler to prove than a policy configuration

03Consequences

Where Logical Isolation Leaves Residual Risk

What happens when the control is missing, and the record cannot be produced.

Always Addressable

Anything with an IP address can be scanned, targeted and eventually reached.

Credential Compromise

Stolen administrator or cloud console credentials can change retention, delete or exfiltrate.

Configuration Drift

Firewall rules and bucket policies change over time, often without the data owner knowing.

Exfiltration Path

A logically isolated copy can still be copied out, creating a reportable personal data breach.

04The architecture

Physical Disconnection As A Technical Measure

Offline Secure Storage® holds personal data on dedicated hardware in the customer's chosen jurisdiction, physically disconnected between identity-verified windows.

Integrity And Confidentiality

With no network interface while offline, there is no remote path to alter, encrypt or exfiltrate the copy.

Timely Restore (Art. 32(1)(c))

Scheduled restore windows return a clean copy after ransomware, supporting availability duties.

Hardware Encryption At Rest

Data is encrypted on dedicated hardware, with identity factors held by the customer.

Jurisdiction Chosen By You

Bunkers across Europe including the UK, so international transfer questions are answered by design.

Regular Testing (Art. 32(1)(d))

Recurring verification windows test and evaluate the effectiveness of the measure.

Accountability Evidence

Every connection, identity check and restore is logged to support Article 5(2) accountability.

“A policy can be changed by whoever holds the keys. A cable that is not connected cannot. That is why physical disconnection is the stronger measure.”

Mark Fermor, CTO, CMO & Founder, Firevault

05What sits offline

Personal Data Best Held Offline

The records most often moved into Offline Secure Storage® for this framework.

HR and payroll records

Client and patient records

Legal case files

Customer databases

CCTV and identity documents

Backups of production systems

Alongside, not instead of

Physical disconnection complements encryption, access control and immutable backups. It provides the copy of last resort.

Aligned with NCSC

The NCSC advises keeping at least one backup offline. Physical disconnection turns that advice into a provable state.

Easier breach assessment

If the offline copy had no network path during an incident, it is simpler to show it was not affected.

Not legal advice

Controllers remain responsible for their own risk assessment. Firevault supplies the architecture and the evidence.

Mark Fermor
David Bailey
Kenny Phipps
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