Technical Documentation

Technical Architecture

System Overview

ChronoSeal is built on a three-tier architecture:

1. Frontend: Django templates with Bootstrap 5, Font Awesome icons, and custom CSS
2. Backend: Django 5.0 with Python 3.11+, using SQLite or PostgreSQL
3. Blockchain: IOTA 2.0 with Notarization Move Package

Data Flow

The data flow through ChronoSeal is as follows:

1. File Upload: User uploads a file through the web interface
2. Hash Computation: System computes SHA-3-256 (or other) hash of the file
3. Notarization: Hash is sent to IOTA node for notarization
4. Storage: Metadata is stored in Django database
5. Certificate: User receives a tamper-proof certificate
6. Verification: Anyone can verify the deposit using the hash

Cryptographic Hashing

ChronoSeal supports multiple cryptographic hash algorithms:

• SHA-3-256 (Recommended): Modern, secure hash function producing 256-bit output
• SHA-256: Widely used, NIST-approved hash function
• BLAKE2b: Fast, cryptographically secure hash function

All hash functions provide:

• Deterministic: Same input always produces same output
• Unique: Different inputs produce different outputs (avalanche effect)
• One-way: Impossible to reverse (recover input from hash)
• Collision-resistant: Extremely unlikely two inputs produce same hash

IOTA Notarization

IOTA Notarization provides immutable, timestamped records on the IOTA ledger:

• Locked Notarizations: Immutable records that cannot be changed or transferred
• Dynamic Notarizations: Mutable records that can be updated
• Timestamping: Precise timestamps from IOTA network consensus
• Fee-less: No transaction costs on IOTA network

Quick Links

• Judicial Guide
• Legal Framework
• About