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PrivateStamp: a private proof-of-existence DApp. Prove that you've had a file at a certain time without compromising your privacy.

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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

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PrivateStamp: a private proof-of-existence DApp. Prove that you've had a file at a certain time without compromising your privacy.

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