Protocols and Standards

The success of SSI relies on interoperable protocols and standards. Key contributions include:

1. W3C DID Standard: Defines how to create and manage globally unique, user-controlled identifiers independent of any centralized authority.

2. W3C Verifiable Credentials Data Model: Specifies the structure and format for Verifiable Credentials (VCs), including cryptographic signing and tamper-proof verification.

3. Industry Initiatives and Working Groups: Organizations like the Decentralized Identity Foundation work on best practices for SSI, fostering interoperability and innovation.

Standards compatibility is the key to data interoperability. Empeiria enables data sharing across various data ecosystems and organizational adoption by adhering to industry standards in the table below.

	Name	Standarizing Body	URL
Data Model	VC, VP	W3C	w3.org/TR/vc-data-model
Credential Format	JWT-VC	W3C	w3.org/TR/vc-data-model/#json-web-token
Credential Format — Signature	JWS	IETF	datatracker.ietf.org/doc/html/rfc7515
Entity Identifier	DID	W3C	w3.org/TR/did-core
User Authentication	SIOPv2	OIDF	openid.net/specs/openid-connect-self-issued-v2-1_0.html
Issuance	OIDC4VC	OIDC4VC	openid.net/specs/openid-4-verifiable-credential-issuance-1_0.html
Revocation	Bitstring Status List	W3C	w3.org/TR/vc-bitstring-status-list
Presentations	OIDC4VP	OIDF	openid.net/specs/openid-4-verifiable-presentation-1_0.html
Presentations	Presentation Exchange	DIF	identity.foundation/presentation-exchange
Messaging	DIDComm Messaging v2.1	DIF	didcomm.org
Configuration/Binding	DIDConfiguration	DIF	identity.foundation/.well-known/resources/did-configuration/
Data Format	JSON for Linking Data (JSON-LD)	W3C	w3.org/TR/json-ld11/
Credential Presentation	JWT VC Presentation Profile	W3C	w3.org/TR/vc-data-model/#presentations-jwt