Welcome to Qpher — Why We Built a Post-Quantum Cryptography Cloud

Your RSA keys have an expiration date — and it's not the one in the certificate.

Quantum computers running Shor's algorithm will factor RSA and solve elliptic-curve discrete logs in polynomial time. The question isn't if, but when. And adversaries aren't waiting.

The Threat Is Already Here

Intelligence agencies and sophisticated attackers are executing a strategy called Harvest Now, Decrypt Later (HNDL): intercepting encrypted data today, storing it, and waiting for quantum hardware to mature.

If your data needs to stay confidential for more than 5 years — financial records, healthcare information, government communications, trade secrets, legal documents — it's already at risk.

This isn't speculation. In August 2024, NIST finalized its first three post-quantum cryptography standards (FIPS 203, 204, 205), and the U.S. government set a 2035 deadline for all federal systems to complete the migration. The clock is ticking for the private sector too.

The Implementation Gap

The standards exist. The algorithms work. So why isn't everyone migrating?

Because PQC is hard to implement correctly:

• Key sizes are 10–50x larger than classical equivalents. ML-KEM-768 public keys are 1,184 bytes vs. 32 bytes for X25519.
• Key lifecycle management adds complexity — versioning, rotation, retirement, and archival policies that most teams have never dealt with.
• Hybrid modes (running PQC alongside classical crypto as a safety net) require careful protocol design.
• One wrong implementation can silently fail — your data looks encrypted but isn't actually quantum-safe.

Most development teams shouldn't have to become cryptography experts just to protect their users' data.

Why We Built Qpher

We built Qpher to close this gap. Post-quantum cryptography as a managed API — so developers can protect data with quantum-resistant algorithms through simple REST calls, without managing PQC infrastructure.

Here's what that looks like:

# Quantum-safe encrypt (ML-KEM-768 + AES-256-GCM)
curl -X POST https://api.qpher.ai/api/v1/kem/encrypt \
  -H "X-API-Key: your-api-key" \
  -d '{"plaintext": "c2Vuc2l0aXZlIGRhdGE=", "key_version": 1}'

One API call. Quantum-resistant encryption. No key management headaches.

What's Under the Hood

Qpher isn't a thin wrapper. It's a full cryptographic infrastructure platform:

Encryption (ML-KEM-768) — NIST FIPS 203, the standardized form of CRYSTALS-Kyber. Lattice-based key encapsulation with hybrid KEM-DEM: the shared secret never leaves our servers, and data is encrypted with AES-256-GCM.

Digital Signatures (ML-DSA-65) — NIST FIPS 204, the standardized form of CRYSTALS-Dilithium. Sign documents, tokens, and audit trails with a quantum-resistant signature that verifies in under 3ms.

Hybrid Modes — Not ready to go PQC-only? Opt in to X-Wing (X25519 + ML-KEM-768) for key encapsulation or Composite ML-DSA (ECDSA P-256 + ML-DSA-65) for signatures. Classical + quantum resistance simultaneously.

Zero-Trust Key Management — Your private keys never leave our secure infrastructure. Every key has explicit versioning, rotation policies, and a complete audit trail. Keys are encrypted at rest with AES-256-GCM and protected by Cloud KMS envelope encryption.

The Scan → Protect Workflow

Not sure where to start? We built a free, open-source tool for that:

Step 1: Find your vulnerabilities — Run pqc-check to scan your codebase for quantum-vulnerable cryptography:

npx pqc-check .

It detects 48 patterns across 9 languages — including RSA, ECDSA, ECDH, DH, and Ed25519 — with risk levels and migration guidance.

Step 2: Protect with Qpher — Replace quantum-vulnerable operations with Qpher API calls. Every pqc-check finding includes a suggested migration path pointing to the corresponding Qpher endpoint.

Step 3: Verify in CI/CD — Add pqc-check to your pipeline with SARIF output. New quantum-vulnerable code gets flagged automatically in pull reviews.

Who Is This For?

If you're building software that handles sensitive data with a long confidentiality horizon, Qpher is for you:

• Fintech & Banking — Transaction records, account data, and inter-bank communications that regulators require you to protect for 7+ years.
• Healthcare — Patient records under HIPAA that must remain confidential indefinitely.
• Government & Defense — Classified and sensitive communications subject to quantum migration mandates.
• SaaS & Enterprise — Customer data, API tokens, and internal secrets that need to outlast the quantum threat timeline.

Get Started in 3 Steps

1. Create a free account at portal.qpher.ai/register. The free tier includes 5,000 API calls per month — enough to prototype and test.

2. Generate your API key in the dashboard. One key, all endpoints.

3. Make your first quantum-safe API call:

# Generate a PQC key pair
curl -X POST https://api.qpher.ai/api/v1/kms/keys/generate \
  -H "X-API-Key: your-api-key" \
  -d '{"algorithm": "kyber768"}'

We also have SDKs for Python, Node.js, and Go.

What's Next

Qpher is actively evolving. Here's what's on our roadmap:

• More SDKs — .NET and Rust SDKs planned
• HSM-backed key storage — Hardware security module integration for the highest protection level
• PQC Playground — Interactive UI to test encrypt/decrypt/sign/verify without writing code
• Compliance certifications — SOC 2 Type II on the roadmap

The quantum threat is real, and the migration window is narrowing. The best time to start is now.

Create your free account and make your first quantum-safe API call today.