Trust Lists are a critical component in decentralized ecosystems like Blerify.

They provide a mechanism to identify and validate trusted entities, ensuring secure and verifiable interactions between users, issuers, and verifiers.

These lists help establish a network of trust by specifying which organizations or entities are recognized as reliable.

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Key Features: #

1. Verifiability: Each entity on the list can be validated using its unique identifier, such as a Decentralized Identifier (DID) or public key.
   
   

2. Decentralization: Trust Lists in decentralized ecosystems are often anchored on a blockchain, ensuring transparency and immutability.
   
   

3. Modularity: An ecosystem can maintain multiple Trust Lists tailored to specific use cases or trust requirements.
   
   

4. Privacy-Preserving: Trust Lists do not store personal data; they only include identifiers or cryptographic keys.

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Usage in Blerify #

In Blerify, Trust Lists are utilized to:

1. Validate Verifiable Credentials (VCs):

   • Verifiers use Trust Lists to ensure the credentials presented originate from authorized issuers.
     
     

2. Authorize Entities:

   • Organizations issuing credentials must be listed as trusted entities.
     
     

3. DID Management:

   • Only DIDs associated with trusted entities can act as issuers or verifiers within the ecosystem.
     
     

4. Interoperability:

   • Facilitate seamless integration with other ecosystems using their own Trust Lists.

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Structure of a Trust List #

A typical Trust List includes the following elements:

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Metadata: #

• ID: A unique identifier for the list.

• Name: The name of the Trust List.

• Version: Indicates the version of the list.

• Timestamps: Creation and last update dates.

Entries: Each entry contains: #

• DID: The Decentralized Identifier of the entity.

• Public Key: Used to verify the authenticity of the entity.

• Purpose: Describes the entity’s role, such as credential issuance or verification.

Digital Signature: #

• The list is signed by a trusted authority to ensure integrity and prevent tampering.

Example Trust List (JSON): #

{
  "id": "trustlist:blerify:2024",
  "name": "Blerify Trusted Issuers",
  "version": "1.0",
  "entries": [
    {
      "did": "did:lacchain:issuer123",
      "publicKey": "0x123abc...",
      "purpose": "credential-issuance"
    },
    {
      "did": "did:lacchain:issuer456",
      "publicKey": "0x456def...",
      "purpose": "identity-verification"
    }
  ],
  "signature": "0x789ghi..."
}

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Trust List Management #

1. Creation and Updates:
   • Trust Lists are created and maintained by a governing authority or community.
   • Updates are performed periodically to add or remove entities.
     
     
2. Resolution and Validation:
   • Verifiers consult the Trust List to validate the entity issuing the credential.
   • In decentralized systems, validation can be performed via blockchain or API services.
     
     
3. Transparency and Auditing:
   • Trust Lists should be publicly accessible for auditing and community review.
     

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Use Cases in Blerify #

1. Education:
   • Validate that universities issuing diplomas are recognized in the Trust List of authorized issuers.
     
     
2. Vouchers:
   • Ensure merchants accepting vouchers are validated and listed as trusted entities.
     
     
3. Event Access:
   • Confirm that verifiers managing event access are authorized and included in the event organizer’s Trust List.
     
     

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Technical Advantages #

1. Integration with Blockchain:
   • Trust Lists anchored to blockchain ensure tamper-proof and transparent management.
     
     
2. Interoperability:
   • Designed to work seamlessly with W3C standards and other decentralized ecosystems.
     
     
3. User Confidence:
   • Users and verifiers can trust that listed entities meet the required standards.