Glossary

Plain-English definitions of every LearnCard term.

Term	Definition
Verifiable Credential (VC)	A digital certificate or badge — like a diploma or skill badge — that is cryptographically signed so anyone can verify it's authentic, and owned by the person who earned it. Based on the W3C standard.
DID (Decentralized Identifier)	A user-owned identifier (like did:key:z6Mk...) that works across systems without a central registry. Every LearnCard user and issuer has one.
Boost	A LearnCard credential template. Define a badge once, then issue copies of it to many recipients — with optional dynamic fields per recipient.
Universal Inbox	LearnCard's delivery system for sending credentials by email or phone to people without an account. Recipients get a claim link, and the credential waits for them to sign up.
ConsentFlow	A contract-based permission system: users explicitly consent to what data an app can read or write, and can withdraw consent at any time.
GameFlow	A ConsentFlow variant for games and apps used by minors, with built-in guardian approval.
Auth Grant / API Token	A scoped, static credential for server-to-server API calls (e.g. scope inbox:write to send credentials). Created once, then used as a Bearer token.
Seed phrase	The random secret that deterministically generates your keys and DID. Whoever holds the seed controls the identity.
SSS (Shamir Secret Sharing)	Splits a private key into shares (2-of-4) so that at rest no single device or server stores the whole key. At sign-in, two shares are combined in memory to reconstruct the key for use. Powers LearnCard's passwordless key management.
Signing Authority	A service that holds a key and signs credentials on an issuer's behalf for claim links and server-side issuance without the issuer's seed. LearnCard can host one.
Profile	An issuer's or user's public identity on the LearnCard Network (profile ID, display name, avatar).
Presentation (VP)	A signed bundle of one or more credentials that a holder shares with a verifier, proving the credentials belong to them.
OBv3 (Open Badges 3.0)	The 1EdTech standard for achievement badges, built on Verifiable Credentials. LearnCard's default badge format.
CLR (Comprehensive Learner Record)	A 1EdTech standard for bundling many achievements (courses, degrees, skills) into one verifiable record.
xAPI	A standard for recording learning activity statements ("Alice completed Lesson 3"). LearnCloud stores xAPI data tied to user DIDs.
CHAPI	The Credential Handler API — a browser protocol for wallet-to-site credential exchange. LearnCard is CHAPI-compatible.
Trust Registry	A list of recognized issuers used to show whether a credential comes from a known, trusted source.
Template (Boost)	A reusable definition of a credential. Send from a template and LearnCard fills in each recipient's copy and signs it for you. Every send creates one; its address looks like lc:network:…:boost:….
Integration	Your project's identity in the Developer Portal. It owns your API tokens, templates, and app listings.