The sandbox design
This is an exit report, dated May 2025. The sandbox work started in Jan 2024 and ended in Jan 2025. The Information Commissioner's Office list of 2025 participants gives the Department for Education an exit date of May 2025. That short account does not mention a blockchain. The report does.
The department entered the sandbox to develop an education credential for post-16 learners in England. The credential uses decentralised identity and verified credentials, so a learner can open, manage and share their information when applying to a further education institution and when enrolling. The aim is to replace paper forms, typing the details in by hand, and photocopying. The office accepted the department in Nov 2023, under the decentralised-identity focus it had then. The report covers only the data-protection aims agreed for the sandbox. The views are the office's understanding of this department. Other organisations may not be able to apply the same points, and the points can change.
The department has chosen a permissioned blockchain, with managed access for schools and further education institutions, to check that a credential is valid. In the report, a blockchain is a ledger that cannot be changed. In digital identity projects it is generally used to manage keys, not to store personal information. One section says the ledger holds public and private keys, which act as a digital signature that the credential comes from a relying party. Earlier, the relying party is the further education institution. A later section says a blockchain is unlikely to affect the right to have data erased, because no personal information is stored on it, only the department's public key. The credential will also use an audit database that records when a credential was issued and what it contained, in a relational database the report calls secure. The office advised that those databases be brought within the rights to correct a record and to have it erased, where erasure applies.
Awarding organisations send exam results to schools and to the department, where they are stored in the Learning Record Service. From there, the results appear in a wallet app, as a verified education credential a learner can choose to share with a further education institution. The department created that app, called the Wallet App, for download from the Google Play store and the Apple app store. A member of staff who knows the learner issues the credential in person, signed in to a service called Issue education records, and the learner scans a QR code with the app. The identifier in the credential is a unique pupil number or a unique learner number.
The sandbox ran alongside a pilot at a small group of schools. The department will take that pilot forward so the identity checks cover hundreds of schools, and the further education organisations that will use the credential. It then needs to consider how to apply the office's advice to the next phase of the roll-out, which the report calls this year. The report does not say a simpler database was chosen instead of the blockchain.
- Source: Regulatory Sandbox Final Report: Department for Education, Information Commissioner's Office (May 2025) · read 22 Oct 2026
- Source: 2025, Information Commissioner's Office, Regulatory Sandbox previous participants, Department for Education · read 22 Oct 2026
Technical detail
One section says the ledger contains public and private keys. A later section says only the department's public key is stored on the blockchain. This card states both. The report calls the ledger immutable. It says the wallet app has been built using Google Firebase. It also says the department set a QR code to last five minutes, after the office raised the possibility of another learner photographing the code. “Select group of schools” and “considerations” are the report's words. The Acts and regulations the report names were not opened. The report's passages on guardians were not used.