PrivateStamp (Alpha version)

A private proof-of-existence DApp.

Prove that you've had a file (of any type & size) at a certain time without compromising your privacy.

Currently deployed on Rinkeby network

Technologies used:

Solidity, Truffle, IPFS, Javascript, Web Crypto API, Vue, Vuetify

You need MetaMask extension installed to interact with the app

Demo:

https://www.youtube.com/watch?v=z74hus7oNH8

Features:

Secure:

• Your original file is never transmitted over the network, both encryption & decryption happen locally.

• Every encryption process generate a different file/hash even if the same file is encrypted with the same password, that's because a random salt is generated everytime.

Decentralized:

• Relies on Ethereum blockchain to store/retrieve data

Cheap:

Currently, the app is deployed on test network, so using it is FREE anyway.

• All expensive operations, such as encryption/decryption/hashing are done locally, only the string that represent the hash that is stored on ethereum.

Development:

Requirements:

• NodeJS v10 (with node-gyp installed globally)
• npm or yarn
• truffle

Smart contract interaction:

• truffle migrate

Frontend app interaction:

• cd app
• npm install or yarn
• npm run serve or yarn serve