Prove a document existed at a time without revealing its content
Beginner8h1
ViemWeb CryptoNext.js
17/20Encrypted IPFS File Drop
Share files that only the intended wallet can decrypt.
Intermediate14h1–2 people16/20 fit
Build Encrypted IPFS File Drop for journalists and teams sharing sensitive files in ~14h with 1–2 people. Stack: Helia + Web Crypto + Wagmi.
Why it wins: Privacy plus decentralised storage.
Build flow
01 · Problem
Cloud links can be forwarded or scanned by the provider.
02 · Solution
Encrypt files in the browser to the recipient's key, upload ciphertext to IPFS and share a link only they can open.
03 · Build
- 1Encrypt files
- 2Upload with Helia
- 3Share CID
- 4Decrypt for recipient
04 · Demo
Share a file and show a different wallet cannot open it.
MVP checklist
- Client encryption
- IPFS upload
- Recipient keys
- Expiry
Tech stack
| Tech | Role | |
|---|---|---|
| Helia | Tooling | Tool |
| Web Crypto | Tooling | Tool |
| Wagmi | React wallet hooks | Chain |
Reference repos
Open-source projects you can build on. Links checked 2026-10-31.
Related ideas
More Web3Publish a portfolio that lives on IPFS and cannot be taken down
Beginner8h1HeliaIPFSHTML15/20Backers get automatic refunds if the goal is not reached
Intermediate16h1–2SolidityFoundryWagmi17/20