BLOCKCHAIN · IDENTITY · ACCESS CONTROL

MAHA DISHA
Decentralized Identity & Financial Infrastructure

Blockchain-backed systems for identity, permissions, document access, and loan management — designed for regulated, high-trust environments where auditability and correctness are non-negotiable.

SYSTEM PRINCIPLES
  • Cryptographically enforced access control
  • Tamper-resistant audit trails
  • Secure document handling without on-chain exposure

The Core Problem

Government and institutional systems handling identity, loans, and sensitive documents face persistent structural issues: centralized databases, weak auditability, manual verification, and unclear access control.

The challenge was not using blockchain for storage — it was designing a system where identity, permissions, and actions could be independently verified, enforced, and audited.

Key Constraints

  • Role-based access enforced cryptographically
  • Secure document handling without exposing raw data
  • Clear lifecycle management of users, permissions, and loans
  • Usability for non-blockchain-native administrators and users

Our Role

Blockchain Architecture

Smart contract design for identity, RBAC, documents, and loan lifecycles.

Full-Stack Engineering

Frontend, backend SDKs, encryption flows, and admin interfaces.

Security & Permissions

End-to-end identity, permission, and access lifecycle design.

How We Approached It

Modular Smart Contracts

Separate contracts for identity, role-based access control (RBAC), loans, and document references—each with clear responsibilities and deterministic behavior.

Cryptographic Access Control

On-chain role enforcement with deterministic access rules. Users cannot bypass permissions—they're enforced at the protocol level, not in application logic.

Encrypted Document Handling

Files encrypted with AES, keys secured via ECIES using Ethereum public keys. On-chain references only—sensitive data never touches blockchain.

Developer-First SDK

JavaScript SDK abstracting blockchain complexity. Developers work with familiar APIs while permissions and crypto happen transparently under the hood.

User-Centric Onboarding

Aadhaar + OTP flows designed for government and institutional use. Modern React interfaces hide blockchain complexity from end users.

Encryption Flow

File → AES encrypt → ECIES key wrap → on-chain ref → access check → decryption → user

What Was Built

Smart Contracts

  • • UserManagement (identity registration & lifecycle)
  • • RBACManager (role-based access control)
  • • LoanManagement (loan state & permissions)
  • • FileRegistry (document references)
  • • KeyRegistry (encrypted key storage)

User Interfaces

  • • Admin dashboard (user & role management)
  • • Citizen portal (document access & status)
  • • Loan management interface
  • • Aadhaar + OTP onboarding flows
  • • Real-time blockchain status tracking

Backend & Infrastructure

  • • JavaScript SDK for permission checks
  • • Private Ethereum deployment
  • • IPFS integration for document storage
  • • Encryption/decryption service layer
  • • Audit logging & compliance reporting

Core System Capabilities

Identity & Access

  • ✓ Verifiable digital identity on blockchain
  • ✓ Cryptographically enforced permissions
  • ✓ Multi-level role hierarchy (citizen, officer, admin)
  • ✓ Secure key management using ECIES

Documents & Loans

  • ✓ Encrypted document storage with access control
  • ✓ Loan application workflow & status tracking
  • ✓ Immutable audit trail for all actions
  • ✓ Extensible for future financial instruments

Outcome

Verifiable Identity

Tamper-resistant identity and permission enforcement.

Reduced Central Trust

Cryptographic enforcement reduced reliance on centralized systems.

Reusable Foundation

A base platform for future regulated governance systems.

Why This Project Matters

MAHA DISHA demonstrates Technakama’s ability to design blockchain systems where trust, identity, and permissions are enforced at the protocol level — not bolted on later. This is blockchain used where it actually makes sense.

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