This system processes UNCLASSIFIED and CUI data only. Do not submit ITAR-controlled or classified data. Security Policy
Live on XRP Ledger Mainnet

Immutable verification
for defense logistics

SHA-256 hash anchoring for supply chains, technical data, and contract deliverables. 23+ ILS tools plus 7 major features. 500+ platforms. No sensitive data on-chain—ever.

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$0.01
Per anchor ($SLS)
3–5s
Ledger confirmation
99.99%
XRPL uptime since 2012
23+
ILS tools built-in
How It Works

Four steps to tamper-proof records

Every defense record gets a cryptographic fingerprint anchored to a public, decentralized ledger. No data leaves your system.

01 — Event
Record created
Part received, maintenance completed, CDRL delivered, or any logistics event occurs.
02 — Hash
SHA-256 fingerprint
A one-way cryptographic hash is computed locally. No data content leaves your environment.
03 — Anchor
Stored on XRPL
The hash is written immutably to the XRP Ledger—confirmed in 3–5 seconds for $0.01.
04 — Verify
Independent proof
Anyone can re-hash the original and compare against the public ledger. No vendor required.
S4 Systems Products

Two products. One mission.

S4 Ledger handles trust and intelligence. HarborLink handles data and collaboration. Together, they cover the full ILS lifecycle.

S4 Ledger

Trust and intelligence layer. Blockchain-verified audit trails, AI-powered analysis, and compliance scoring for defense logistics.

  • 23 ILS analysis and verification tools + 7 major features
  • XRPL hash anchoring—tamper-proof records
  • AI-powered gap analysis, risk scoring, and smart summaries
  • One-click audit report generation with AI highlights
  • Predictive maintenance and failure forecasting
  • Compliance scorecard (CMMC, NIST, DFARS)
Launch Platform

HarborLink

Data management and collaboration portal. Where defense teams submit, review, and manage ILS deliverables across the supply chain.

  • Parts cross-reference and NSN lookup
  • Contract lifecycle and CDRL tracking
  • Digital thread and configuration management
  • Provisioning and warranty tracking
  • Secure file exchange between parties
  • Integrated with S4 Ledger verification
Integration Architecture
Why the XRP Ledger

Built on the only chain that meets defense requirements

Public, decentralized, 13+ years of uninterrupted operation, and a fraction of a cent per transaction.

3–5 second finality

Ethereum takes 12+ minutes. Solana has suffered multiple outages. XRPL has settled in seconds with 99.99% uptime since 2012.

Zero data on-chain

Only SHA-256 hashes are stored. No sensitive data, no CUI, no ITAR content ever touches the blockchain. Just cryptographic fingerprints.

Public and neutral

150+ independent validators. No vendor lock-in. Anyone can verify an anchor—no proprietary software, no subscription required.

Compliance & Security

Defense-grade from day one

Aligned with federal security standards. Deployable from unclassified through Top Secret networks.

Standard
NIST SP 800-171
Framework
CMMC Level 2
Regulation
DFARS 252.204-7012
Data Policy
Zero data on-chain
Classified
On-prem deployment

Ready to secure your supply chain?

Schedule a demo to see immutable verification in action. Or launch the platform and try it yourself.

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