Identity Attestation

Aqua Protocol provides comprehensive identity attestation capabilities that enable secure, privacy-preserving verification of identities and credentials without relying on centralized authorities.

Overview

Identity attestation with Aqua Protocol enables:

Decentralized identity verification without centralized authorities
Privacy-preserving attestation with selective disclosure
Cryptographic proof of identity and credential authenticity
Cross-platform compatibility and portability
Audit trails for compliance and verification

Use Cases

Digital Identity

Government e-identity and digital citizenship
Healthcare patient identity verification
Financial services KYC and compliance
Education student identity and credentials

Professional Credentials

Professional certifications and licenses
Employment verification and references
Skills assessment and portfolios
Continuing education credits and certificates

Access Control

Building access and security systems
Digital services and subscription management
Content access and permission management
API access and rate limiting

Compliance and Regulation

Regulatory compliance and reporting
Audit trails and verification
Data protection and privacy compliance
Cross-border identity verification

Implementation Examples

Basic Identity Attestation

import { AquaClient } from '@aqua-protocol/sdk';

const client = new AquaClient({
  apiKey: process.env.AQUA_API_KEY,
  endpoint: 'https://api.aqua-protocol.org/v3'
});

// Create identity attestation
const createIdentityAttestation = async (identityData) => {
  const attestation = {
    subject: identityData.identityHash,
    issuer: identityData.issuer,
    claim: {
      type: 'identity_verification',
      name: identityData.name,
      email: identityData.email,
      dateOfBirth: identityData.dateOfBirth,
      nationality: identityData.nationality
    },
    timestamp: new Date().toISOString()
  };
  
  const notarization = await client.notarize({
    content: JSON.stringify(attestation),
    metadata: {
      type: 'identity_attestation',
      subject: identityData.identityHash,
      issuer: identityData.issuer
    }
  });
  
  return notarization.verificationHash;
};

// Verify identity attestation
const verifyIdentityAttestation = async (attestationHash, expectedData) => {
  const verification = await client.verify({
    verificationHash: attestationHash,
    content: JSON.stringify(expectedData)
  });
  
  return {
    isValid: verification.isValid,
    timestamp: verification.timestamp,
    blockNumber: verification.blockNumber
  };
};

Educational Credential Attestation

// Educational credential attestation
const createEducationalAttestation = async (credentialData) => {
  const attestation = {
    subject: credentialData.identityHash,
    issuer: credentialData.institution,
    claim: {
      type: 'educational_credential',
      degree: credentialData.degree,
      field: credentialData.field,
      institution: credentialData.institution,
      graduationDate: credentialData.graduationDate,
      gpa: credentialData.gpa
    },
    timestamp: new Date().toISOString()
  };
  
  const notarization = await client.notarize({
    content: JSON.stringify(attestation),
    metadata: {
      type: 'educational_attestation',
      subject: credentialData.identityHash,
      institution: credentialData.institution,
      degree: credentialData.degree
    }
  });
  
  return notarization.verificationHash;
};

// Verify educational credential
const verifyEducationalCredential = async (attestationHash, expectedData) => {
  const verification = await client.verify({
    verificationHash: attestationHash,
    content: JSON.stringify(expectedData)
  });
  
  return {
    isValid: verification.isValid,
    degree: expectedData.degree,
    institution: expectedData.institution,
    graduationDate: expectedData.graduationDate
  };
};

Professional Certification Attestation

// Professional certification attestation
const createProfessionalAttestation = async (certificationData) => {
  const attestation = {
    subject: certificationData.identityHash,
    issuer: certificationData.organization,
    claim: {
      type: 'professional_certification',
      certification: certificationData.certification,
      organization: certificationData.organization,
      issuedDate: certificationData.issuedDate,
      expiryDate: certificationData.expiryDate,
      level: certificationData.level
    },
    timestamp: new Date().toISOString()
  };
  
  const notarization = await client.notarize({
    content: JSON.stringify(attestation),
    metadata: {
      type: 'professional_attestation',
      subject: certificationData.identityHash,
      organization: certificationData.organization,
      certification: certificationData.certification
    }
  });
  
  return notarization.verificationHash;
};

// Verify professional certification
const verifyProfessionalCertification = async (attestationHash, expectedData) => {
  const verification = await client.verify({
    verificationHash: attestationHash,
    content: JSON.stringify(expectedData)
  });
  
  return {
    isValid: verification.isValid,
    certification: expectedData.certification,
    organization: expectedData.organization,
    issuedDate: expectedData.issuedDate,
    expiryDate: expectedData.expiryDate,
    isExpired: new Date() > new Date(expectedData.expiryDate)
  };
};

Advanced Features

Selective Disclosure

// Selective disclosure for privacy
const createSelectiveAttestation = async (attestationData) => {
  const attestation = {
    subject: attestationData.identityHash,
    issuer: attestationData.issuer,
    claim: {
      type: 'selective_attestation',
      name: attestationData.name,
      email: attestationData.email,
      dateOfBirth: attestationData.dateOfBirth,
      ssn: attestationData.ssn,
      address: attestationData.address
    },
    timestamp: new Date().toISOString()
  };
  
  const notarization = await client.notarize({
    content: JSON.stringify(attestation),
    metadata: {
      type: 'selective_attestation',
      subject: attestationData.identityHash
    },
    options: {
      hashingMethod: 'tree' // Enable selective disclosure
    }
  });
  
  return notarization.verificationHash;
};

// Verify with selective disclosure
const verifySelectiveAttestation = async (attestationHash, disclosedFields) => {
  const verification = await client.verifySelective({
    verificationHash: attestationHash,
    disclosedFields: disclosedFields,
    verifier: '0xverifier123...'
  });
  
  return verification;
};

Multi-Factor Attestation

// Multi-factor attestation
const createMultiFactorAttestation = async (attestationData) => {
  const attestation = {
    subject: attestationData.identityHash,
    issuer: attestationData.issuer,
    claim: {
      type: 'multi_factor_attestation',
      factors: [
        {
          type: 'government_id',
          verified: true,
          method: 'document_scan'
        },
        {
          type: 'biometric',
          verified: true,
          method: 'fingerprint'
        },
        {
          type: 'phone_verification',
          verified: true,
          method: 'sms'
        }
      ]
    },
    timestamp: new Date().toISOString()
  };
  
  const notarization = await client.notarize({
    content: JSON.stringify(attestation),
    metadata: {
      type: 'multi_factor_attestation',
      subject: attestationData.identityHash,
      factors: attestationData.factors.length
    }
  });
  
  return notarization.verificationHash;
};

Attestation Chains

// Attestation chain verification
const createAttestationChain = async (attestations) => {
  const chain = [];
  
  for (let i = 0; i < attestations.length; i++) {
    const attestation = attestations[i];
    const previousHash = i > 0 ? chain[i - 1].verificationHash : null;
    
    const notarization = await client.notarize({
      content: JSON.stringify(attestation),
      metadata: {
        type: 'attestation_chain',
        subject: attestation.subject,
        issuer: attestation.issuer,
        chainIndex: i,
        previousHash: previousHash
      }
    });
    
    chain.push({
      ...attestation,
      verificationHash: notarization.verificationHash,
      previousHash: previousHash
    });
  }
  
  return chain;
};

// Verify attestation chain
const verifyAttestationChain = async (chain) => {
  const verificationResults = [];
  
  for (let i = 0; i < chain.length; i++) {
    const attestation = chain[i];
    const verification = await client.verify({
      verificationHash: attestation.verificationHash,
      content: JSON.stringify(attestation)
    });
    
    verificationResults.push({
      index: i,
      verification,
      isValid: verification.isValid
    });
  }
  
  return verificationResults;
};

Industry-Specific Implementations

Healthcare Identity Attestation

// Healthcare identity attestation
class HealthcareIdentityAttestation {
  constructor(aquaClient) {
    this.client = aquaClient;
  }

  async createPatientIdentity(patientData) {
    const attestation = {
      subject: patientData.identityHash,
      issuer: patientData.healthcareProvider,
      claim: {
        type: 'patient_identity',
        patientId: patientData.patientId,
        name: patientData.name,
        dateOfBirth: patientData.dateOfBirth,
        medicalRecordNumber: patientData.medicalRecordNumber,
        insuranceNumber: patientData.insuranceNumber
      },
      timestamp: new Date().toISOString()
    };
    
    const notarization = await this.client.notarize({
      content: JSON.stringify(attestation),
      metadata: {
        type: 'patient_identity',
        subject: patientData.identityHash,
        healthcareProvider: patientData.healthcareProvider
      }
    });
    
    return notarization.verificationHash;
  }

  async createMedicalLicense(licenseData) {
    const attestation = {
      subject: licenseData.identityHash,
      issuer: licenseData.medicalBoard,
      claim: {
        type: 'medical_license',
        licenseNumber: licenseData.licenseNumber,
        specialty: licenseData.specialty,
        issuedDate: licenseData.issuedDate,
        expiryDate: licenseData.expiryDate,
        status: licenseData.status
      },
      timestamp: new Date().toISOString()
    };
    
    const notarization = await this.client.notarize({
      content: JSON.stringify(attestation),
      metadata: {
        type: 'medical_license',
        subject: licenseData.identityHash,
        medicalBoard: licenseData.medicalBoard
      }
    });
    
    return notarization.verificationHash;
  }
}

Financial Services Identity Attestation

// Financial services identity attestation
class FinancialIdentityAttestation {
  constructor(aquaClient) {
    this.client = aquaClient;
  }

  async createKYCAttestation(kycData) {
    const attestation = {
      subject: kycData.identityHash,
      issuer: kycData.financialInstitution,
      claim: {
        type: 'kyc_verification',
        name: kycData.name,
        dateOfBirth: kycData.dateOfBirth,
        address: kycData.address,
        idType: kycData.idType,
        idNumber: kycData.idNumber,
        riskLevel: kycData.riskLevel
      },
      timestamp: new Date().toISOString()
    };
    
    const notarization = await this.client.notarize({
      content: JSON.stringify(attestation),
      metadata: {
        type: 'kyc_verification',
        subject: kycData.identityHash,
        financialInstitution: kycData.financialInstitution
      }
    });
    
    return notarization.verificationHash;
  }

  async createCreditScoreAttestation(creditData) {
    const attestation = {
      subject: creditData.identityHash,
      issuer: creditData.creditBureau,
      claim: {
        type: 'credit_score',
        score: creditData.score,
        range: creditData.range,
        factors: creditData.factors,
        reportDate: creditData.reportDate
      },
      timestamp: new Date().toISOString()
    };
    
    const notarization = await this.client.notarize({
      content: JSON.stringify(attestation),
      metadata: {
        type: 'credit_score',
        subject: creditData.identityHash,
        creditBureau: creditData.creditBureau
      }
    });
    
    return notarization.verificationHash;
  }
}

Education Identity Attestation

// Education identity attestation
class EducationIdentityAttestation {
  constructor(aquaClient) {
    this.client = aquaClient;
  }

  async createStudentIdentity(studentData) {
    const attestation = {
      subject: studentData.identityHash,
      issuer: studentData.institution,
      claim: {
        type: 'student_identity',
        studentId: studentData.studentId,
        name: studentData.name,
        program: studentData.program,
        enrollmentDate: studentData.enrollmentDate,
        status: studentData.status
      },
      timestamp: new Date().toISOString()
    };
    
    const notarization = await this.client.notarize({
      content: JSON.stringify(attestation),
      metadata: {
        type: 'student_identity',
        subject: studentData.identityHash,
        institution: studentData.institution
      }
    });
    
    return notarization.verificationHash;
  }

  async createTranscriptAttestation(transcriptData) {
    const attestation = {
      subject: transcriptData.identityHash,
      issuer: transcriptData.institution,
      claim: {
        type: 'transcript',
        studentId: transcriptData.studentId,
        courses: transcriptData.courses,
        gpa: transcriptData.gpa,
        degree: transcriptData.degree,
        graduationDate: transcriptData.graduationDate
      },
      timestamp: new Date().toISOString()
    };
    
    const notarization = await this.client.notarize({
      content: JSON.stringify(attestation),
      metadata: {
        type: 'transcript',
        subject: transcriptData.identityHash,
        institution: transcriptData.institution
      }
    });
    
    return notarization.verificationHash;
  }
}

Integration Patterns

API Integration

// Express.js API for identity attestation
const express = require('express');
const { AquaClient } = require('@aqua-protocol/sdk');

const app = express();
const client = new AquaClient({
  apiKey: process.env.AQUA_API_KEY,
  endpoint: process.env.AQUA_ENDPOINT
});

// Create attestation endpoint
app.post('/api/attestations', async (req, res) => {
  try {
    const { subject, issuer, claim } = req.body;
    
    const attestation = {
      subject,
      issuer,
      claim,
      timestamp: new Date().toISOString()
    };
    
    const notarization = await client.notarize({
      content: JSON.stringify(attestation),
      metadata: {
        type: 'identity_attestation',
        subject: subject,
        issuer: issuer
      }
    });
    
    res.json({
      success: true,
      verificationHash: notarization.verificationHash
    });
  } catch (error) {
    res.status(500).json({
      error: error.message
    });
  }
});

// Verify attestation endpoint
app.post('/api/attestations/verify', async (req, res) => {
  try {
    const { verificationHash, expectedData } = req.body;
    
    const verification = await client.verify({
      verificationHash,
      content: JSON.stringify(expectedData)
    });
    
    res.json({
      isValid: verification.isValid,
      timestamp: verification.timestamp
    });
  } catch (error) {
    res.status(500).json({
      error: error.message
    });
  }
});

Database Integration

// MongoDB integration for identity attestation
const mongoose = require('mongoose');
const { AquaClient } = require('@aqua-protocol/sdk');

const AttestationSchema = new mongoose.Schema({
  subject: String,
  issuer: String,
  claim: Object,
  verificationHash: String,
  createdAt: { type: Date, default: Date.now }
});

const Attestation = mongoose.model('Attestation', AttestationSchema);

class IdentityAttestationService {
  constructor(aquaClient) {
    this.client = aquaClient;
  }

  async createAttestation(attestationData) {
    const attestation = {
      subject: attestationData.subject,
      issuer: attestationData.issuer,
      claim: attestationData.claim,
      timestamp: new Date().toISOString()
    };
    
    const notarization = await this.client.notarize({
      content: JSON.stringify(attestation),
      metadata: {
        type: 'identity_attestation',
        subject: attestationData.subject,
        issuer: attestationData.issuer
      }
    });
    
    const dbAttestation = new Attestation({
      subject: attestationData.subject,
      issuer: attestationData.issuer,
      claim: attestationData.claim,
      verificationHash: notarization.verificationHash
    });
    
    await dbAttestation.save();
    return dbAttestation;
  }

  async verifyAttestation(verificationHash) {
    const attestation = await Attestation.findOne({ verificationHash });
    if (!attestation) {
      throw new Error('Attestation not found');
    }
    
    const verification = await this.client.verify({
      verificationHash: attestation.verificationHash,
      content: JSON.stringify({
        subject: attestation.subject,
        issuer: attestation.issuer,
        claim: attestation.claim
      })
    });
    
    return {
      attestation,
      verification
    };
  }
}

Best Practices

Privacy and Security

Implement selective disclosure for sensitive information
Use encryption for sensitive data
Implement access control for attestation data
Regular security audits and updates

Performance

Cache verification results for frequently accessed attestations
Use batch operations for multiple attestations
Implement rate limiting for API endpoints
Monitor performance and optimize as needed

Compliance

Maintain audit trails for all operations
Implement data retention policies
Ensure regulatory compliance for your industry
Regular compliance reviews and updates

User Experience

Simplify attestation creation process
Provide clear verification status
Enable easy sharing of attestations
Support multiple verification methods

​Identity Attestation

​Overview

​Use Cases

​Digital Identity

​Professional Credentials

​Access Control

​Compliance and Regulation

​Implementation Examples

​Basic Identity Attestation

​Educational Credential Attestation

​Professional Certification Attestation

​Advanced Features

​Selective Disclosure

​Multi-Factor Attestation

​Attestation Chains

​Industry-Specific Implementations

​Healthcare Identity Attestation

​Financial Services Identity Attestation

​Education Identity Attestation

​Integration Patterns

​API Integration

​Database Integration

​Best Practices

​Privacy and Security

​Performance

​Compliance

​User Experience