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Companies

QuantumSafe Data Systems

One-time pad encryption for private enterprise networks

  • Norwell, MA
  • Founded 2022
  • Cybersecurity
  • qd5.com

Raised to date

$263K

of $12.6M offered across 1 Form D filing

Still open
$12.3M
Investors
3
Last filed
Jul 16, 2026

About

QuantumSafe Data Systems Inc., doing business as QD5 (Quantum Defen5e), is a cybersecurity company that builds a unified platform to protect data against both conventional attacks and future quantum-computer decryption. Its technology combines patent-protected one-time pad (OTP) encryption with Zero Trust, secure-by-design network controls, marketed as an alternative to Quantum Key Distribution at lower cost and complexity. The platform spans unified endpoint management, identity and access management, and secure communications protecting data at rest, in use, and in motion. The company holds exclusive rights to manufacture, market, sell, and sublicense products using the underlying OTP-based quantum-safe encryption in the United States and many other countries.

Delivers one-time-pad-grade, quantum-resistant encryption over ordinary networks using purpose-built routers and gateways, giving customers QKD-level protection without QKD's cost, specialized hardware, and deployment complexity.

Funding

  • EquityFiled Jul 16, 2026Form D/A
    $263K/ $12.6M

Product

Quantum-Ready Private Network (QPN)

Quantum-safe network encryption platform

The backbone of the QD5 platform: an encrypted private network that protects data in transit across enterprise IT, industrial control systems, and remote-worker access, using one-time pad based encryption implemented with Zero Trust, secure-by-design controls.

  • One-time pad (OTP) based encryption for data at rest, in use, and in motion
  • Zero Trust, secure-by-design architecture
  • Protects industrial control systems and remote/distributed workforces

Built for

Enterprises of all sizes, government agencies, and critical infrastructure operators that need quantum-resistant protection for sensitive data and control systems

People on file