PORTFOLIO PROJECT 04 · SECURITY / TRUST

Verify document integrity without storing the document.

Register a SHA-256 fingerprint, verify exact copies, detect modified files, record an audit trail and demonstrate signed verification receipts.

Try live demo

SHA-256Audit trailEd25519 receiptsQR verification

Transparent demo mode: GitHub Pages uses Web Crypto + localStorage. The repository contains the real FastAPI, SQLAlchemy, PostgreSQL/Docker, QR, PDF and Ed25519 implementation.

STEP 1

Register document

Waiting

Choose a documentUse the sample file for the guided flow.

Document typeRegistered by

STEP 2

Verify a copy

Waiting

Verification ID Choose candidate documentIts SHA-256 is calculated locally.

0Registered

0Verified

0Failed

0Receipts

AUDITABILITY

Audit trail

No activity yet.

LATEST RECEIPT

Verification evidence

A receipt appears after verification.

FULL ENGINEERING IMPLEMENTATION

Repository architecture

Upload→SHA-256→Fingerprint DB→Verification→Audit→Signed receipt

FastAPI

Registration, verification, analytics and public APIs.

PostgreSQL ready

SQLAlchemy + Docker Compose.

Privacy aware

Original file bytes are discarded after hashing.

Ed25519

Canonical receipt payloads are digitally signed.

QR + PDF

Public verification QR and downloadable receipt.

Automated tests

Pytest + GitHub Actions.