ShieldFive
Encrypted cloud storage, 5 TB for €249 paid once
8 followers
Encrypted cloud storage, 5 TB for €249 paid once
8 followers
End-to-end encrypted cloud storage. Every file and its name is encrypted in your browser before upload, with an ML-KEM-1024 post-quantum layer by default, so ShieldFive stores only ciphertext and never holds your keys. 10 GB free, or Founding Lifetime: 5 TB for €249 paid once until 30 Nov (then €299), 30-day refund. Preview PDFs, photos, video and Office files in the browser, import Google Photos, share with expiring links. Open-source crypto library; no desktop sync or iOS app yet.
Hi Product Hunt, I'm Cho. I built ShieldFive.
I made it because the encrypted-storage tools I was using kept adding AI features that need to read your files. I wanted the opposite: store an encrypted blob, and leave the key with you.
What it is: your files and file names are encrypted in your browser before they upload. The server only ever holds ciphertext. No admin override, no key escrow, no support agent who can be talked into your files.
Post-quantum: new uploads add an ML-KEM-1024 layer by default, alongside XChaCha20-Poly1305 for the content, aimed at "harvest now, decrypt later". The crypto is a separate Apache-2.0 library on npm, the same code that runs in your browser.
The honest part, up front:
No external audit yet.
Password share links and Send links are not covered by the post-quantum layer.
Web app today; Android is coming to Google Play; iOS and desktop are in testing.
If you lose your password and your 24-word recovery key, your data is gone. The product says so loudly.
EU-hosted, 10 GB free, no card to start. If you ever want out, /export takes your encrypted files and decrypts them offline with the open-source library, no ShieldFive servers needed.
The full design and its limits are in the white paper: https://shieldfive.com/security/whitepaper
The original write-up: https://dev.to/chogarcia/making-post-quantum-the-default-in-a-file-format-not-a-toggle-59c0
I'd love feedback, especially the skeptical kind.