Your team's files.
Actually private.
Cloud providers can read your files. Ex-employees might still have access. And quantum computers threaten today's encryption. HybridCipher changes that—with zero-trust architecture and cryptographic proof of membership and key events.
Your "secure" cloud drive isn't
Every day, your most sensitive documents sit vulnerable—readable by providers, accessible to ex-employees, and defenseless against tomorrow's quantum attacks.
Your cloud is compromised by design
Your provider holds the keys. One breach, one subpoena, one admin mistake—and your confidential files are readable.
Ex-employees don’t lose access—they linger
Offboarding misses accounts, shared links, and SaaS permissions. Yesterday’s contractor becomes today’s insider.
Harvest-now, decrypt-later is already underway
Attackers can store encrypted data today and crack it later. If your data must last, your crypto must survive.
One breach is enough
Without cryptographic evidence, audits become guesswork. And when things go wrong, the damage is brutal—and slow to stop.
HybridCipher: Real privacy enforced by crypto
Not just “encrypted at rest”—client-side, post-quantum ready, and verifiable. Here is how we shut down each risk:
Files are encrypted before upload. Your cloud provider only stores ciphertext, and HybridCipher never holds your file keys—so there is nothing to steal and nothing to hand over.
Remove a member and the group rekeys to a new epoch key. Removed devices never receive the new keys, so they cannot decrypt any newly encrypted data—locked out by cryptography, not policy.
We use hybrid key exchange so your security doesn't bet on a single world-view. If one side weakens (classical or post-quantum), the session still stands—protecting long-lived data during the migration era.
Generate verifiable records for key epochs and membership changes. Provide cryptographic evidence for membership and key events—not screenshots.
Revoke access in seconds, not days.
When an employee leaves, you don't need to change passwords or rotate keys manually. Just remove them from the group, and they lose access to new encryption epochs immediately.
Kill Switch
Cryptographically enforce access revocation immediately.
Audit Everything
Track key events with tamper-evident logs.
How HybridCipher Works
Under the hood, sophisticated cryptography. For your team, it just works.
Step 1: You encrypt locally
ChaCha20-Poly1305 per-file encryptionFiles are encrypted on your device with a unique key before upload. Your data never leaves unprotected.
Step 2: Keys wrap with epoch keys
HKDF-derived epoch keys with AEADFile keys are wrapped with your team's current epoch key—a shared secret only current members have.
Step 3: Server stores encrypted blobs
Zero-knowledge serverThe server receives only encrypted data and wrapped keys. Mathematically impossible to decrypt without epoch key.
Step 4: Team members decrypt seamlessly
Cryptographic access controlAny current team member can unwrap and decrypt files instantly. Removed members can't access new epoch keys.
Step 5: Audit logs prove everything
Signed Merkle roots & inclusion proofsMerkle-tree commits create tamper-proof logs key events and prevent server equivocation.
The Result
Your team works normally—drag, drop, edit, share. Behind the scenes, enterprise-grade encryption, quantum resistance, and cryptographic proof of access.
Not all "secure" drives are equal
Most solutions force you to choose between security and usability. We refuse to compromise.
| Feature | Google Drive | Dropbox | Traditional E2E | Best Choice HybridCipher |
|---|---|---|---|---|
| End-to-end encrypted | ||||
| Quantum-resistant | ||||
| Zero-knowledge server | ||||
| Fast revocation | ||||
| Cryptographic audit logs | ||||
| No key management burden |
Why quantum resistance matters now
Adversaries are harvesting encrypted data today to decrypt it once quantum computers arrive. Files encrypted with HybridCipher remain safe even after Q-Day.
Built on transparency, not trust
Don't take our word for it. Verify everything yourself.
Transparency Commitment
Our cryptographic implementation will be open sourced once stable. No security through obscurity.
View our repositoryPeer-Reviewed Crypto
Built on NIST-approved ML-KEM-768 and battle-tested X25519. No homebrew cryptography.
Read the paperCryptographic Standards
Team Pilot Program
Only 5 teams will shape the future of secure file collaboration
Team
- Pilot phase: Completely free
- Post-launch: 3 months free + 30% off forever
- 1-on-1 onboarding with the founder
- Full feature access + audit logs
- Featured as a case study
Enterprise
- Enterprise-grade access controls
- On-premise server deployment
- Dedicated support