The vocabulary of verifiable credentials.

Data controller

Under GDPR, the entity that determines the purposes and means of processing personal data — one of the two primary GDPR roles alongside the processor.

Data processor

Under GDPR, the entity that processes personal data on behalf of a controller — LearnCoin is the processor for tenant-issued credentials.

Erasure

Also: GDPR erasure, right to erasure, right to be forgotten

A recipient's GDPR-granted right to have their personal data removed from LearnCoin's records — independent of whether the credential is still valid.

European Accessibility Act

Also: EAA

The EU directive mandating accessibility for digital products and services — enforces WCAG 2.2 AA conformance for EU public-sector procurement from 2025.

FERPA

Also: Family Educational Rights and Privacy Act

The US federal law governing privacy of student education records — LearnCoin's US institutional tenants are FERPA-bound.

GDPR

Also: General Data Protection Regulation

The EU regulation governing personal-data protection — the primary legal framework LearnCoin's architecture is designed around.

GDPR-aware schema

Also: GDPR schema split

LearnCoin's architectural pattern of storing pseudonymous identifiers on-chain and all PII off-chain under tenant-scoped RLS.

Personally Identifiable Information

Also: PII, personal data

Data that identifies or can be used to identify a natural person — legal name, email, government ID — subject to GDPR and similar regimes.

Privacy by design

Also: Privacy by Design, PbD

The principle that privacy protection is engineered into a system from the start — not bolted on. GDPR Article 25 codifies it as 'data protection by design and by default.'

Row Level Security

Also: RLS, tenant-scoped RLS

A PostgreSQL feature that enforces per-row access control at the database layer — LearnCoin uses it to isolate tenants' data.

Selective disclosure

Also: selective-disclosure VC

A credential-presentation technique that reveals only some signed claims while cryptographically proving the rest exist — no need to reveal or re-sign.

WCAG 2.2 AA

Also: Web Content Accessibility Guidelines 2.2

The W3C web-accessibility standard — LearnCoin commits to WCAG 2.2 Level AA conformance on every public credential surface from day one.