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Cryptographic Operations

Key management, encryption, signatures, and zero-knowledge proofs

01

Overview

YieldFabric provides comprehensive cryptographic infrastructure:

Zero-Knowledge Privacy

Confidential transactions using ZK-proof technology

Secure Key Management

Asymmetric cryptography with secure keystore

Digital Signatures

Cryptographic verification for high-security operations

Encryption/Decryption

Data protection using public/private key pairs

02

Key Management

Generate User Keypair

curl -X POST https://auth.yieldfabric.com/api/v1/crypto/keypairs \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "entity_type": "user",
    "entity_id": "user_abc123"
  }'

Generate Group Keypair

curl -X POST https://auth.yieldfabric.com/api/v1/crypto/keypairs \
  -H "Authorization: Bearer $DELEGATION_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "entity_type": "group",
    "entity_id": "group_xyz789"
  }'

List Keypairs

curl -X GET https://auth.yieldfabric.com/api/v1/crypto/keypairs \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "entity_type": "user",
    "entity_id": "user_abc123"
  }'
03

Encryption and Decryption

Encrypt Data

Encrypt sensitive data using a public key:

curl -X POST https://auth.yieldfabric.com/api/v1/crypto/encrypt \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "data": "Confidential business data",
    "public_key": "04a1b2c3d4e5f6789..."
  }'

Decrypt Data

curl -X POST https://auth.yieldfabric.com/api/v1/crypto/decrypt \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "encrypted_data": "eyJhbGciOiJIUzI1NiIs...",
    "entity_type": "user",
    "entity_id": "user_abc123"
  }'
04

Digital Signatures

Sign Data

curl -X POST https://auth.yieldfabric.com/api/v1/crypto/sign \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "data": "Contract terms to sign",
    "entity_type": "user",
    "entity_id": "user_abc123"
  }'

Verify Signature

curl -X POST https://auth.yieldfabric.com/api/v1/crypto/verify \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "data": "Contract terms to sign",
    "signature": "3045022100a1b2c3d4...",
    "public_key": "04a1b2c3d4e5f6789..."
  }'
05

Zero-Knowledge Proofs

YieldFabric uses zero-knowledge proofs for confidential transactions:

Balance Proofs

Prove balance without revealing amount

Range Proofs

Prove value is within range

Equality Proofs

Prove two values are equal

Membership Proofs

Prove value is in set

Privacy Features

  • Confidential transaction amounts - Hidden from public view
  • Hidden account balances - Privacy-preserving queries
  • Private payment flows - Encrypted transaction details
  • Anonymous transaction verification - Verify without revealing identity
06

Security Best Practices

Key Management

  • Regular key rotation
  • Use hardware security modules when possible
  • Limit key access to authorized users
  • Log all cryptographic operations

Encryption Guidelines

  • Generate keys with sufficient entropy
  • Use secure key exchange protocols
  • Encrypt sensitive data appropriately
  • Keep cryptographic libraries updated

Signature Security

  • Use unique nonces for each signature
  • Include timestamps in signed data
  • Verify public keys before use
  • Always verify signatures before processing
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