Trust & Security

Feature	TVS CodeStamp	Typical TSA
Source Code Transparency	✔ Open / Auditable	✖ Closed / Proprietary
Offline Verification	✔ Fully Supported	✖ Usually Not Available
No Central Authority	✔ Trustless Architecture	✖ Relies on central TSA server
Censorship Resistance	✔ 100%	✖ Depends on provider/location
Blockchain Optionality	✔ Optional OTS integration	✖ Rarely used / expensive
File Ownership Proof	✔ With embedded hash	✔ Supported (with `.tsr` file)
Requires Account or API Key	✖ No login required	✔ Yes
Designed for Legacy + Freedom	✅ Yes – Future-proof + Decentralized	✖ Centralized + Certificate-bound

1. Introduction

TVS CodeStamp is a decentralized, cryptographic timestamping mechanism designed for proof-of-existence, authenticity, and time anchoring of digital data — without requiring third-party authorities or blockchain infrastructure.

2. Functional Architecture

tvs_codestamp = HMAC(daily_secret, file_hash + timestamp)

file_hash = SHA-256 hash of file contents
timestamp = UNIX time in seconds
daily_secret = HMAC(base_secret, YYYY-MM-DD)
base_secret = private server-side 256-bit key

3. Security Guarantees

Code uniqueness: every second + file hash yields unique code
Backdating resistance: impossible without base_secret
Offline verifiability: no server access needed
No logs / tracking: math-based, not record-based
Blockchain optional: support for OpenTimestamps

4. Threat Scenarios

TSA Equivalence: Some legal systems prefer centralized TSA. TVS offers blockchain or audit trail anchoring as optional redundancy.

Key Leakage: In case of base_secret exposure, daily secret fingerprints can provide accountability. Vault/HSM storage recommended.

Fake Code Attempt: A forged code won’t verify unless all inputs match exactly.

5. Cryptographic Foundation

HMAC-SHA256 (default) or BLAKE3
One-way & deterministic
Sensitive to byte-level change
Replay- and spoof-resistant

6. Transparency & Auditing

Public algorithm (documented + verifiable)
CLI verifier (open-source)
No centralized lookup table
Cert PDF includes hash, timestamp, QR link

7. Use Cases

TVS CodeStamp is ideal for content creators, archivists, researchers, legal timestamping, digital legacies, and future-bound digital proof.

8. Summary

TVS CodeStamp provides proof without authority. It removes the need for centralized TSA while remaining trustless, user-verifiable, and audit-ready.

📄 Download PDF Whitepaper

Open Source & Transparency

TimeVaultSecure is committed to transparency. Our TVS CodeStamp algorithm and verification logic are fully open source. You can inspect, validate, or contribute via our GitHub repository.

# Example CodeStamp logic
daily_secret = HMAC(base_secret, 'YYYY-MM-DD')
tvs_codestamp = HMAC(daily_secret, file_hash + timestamp)

🔗 View Repository 📥 Download CLI Tool

Trust what you can verify. No black boxes. No central authorities.

TVS CodeStamp

Compare TVS to TSA

TVS CodeStamp – Threat Model & Trust Design