What is this?

This is a client-side web application for a decentralised ZK-ABE system. This includes a server that generates the public key and master secret key, and also with a codebase for encryption, secret key generation, and decryption.

The codebase for the ABE system we are using is derived from the rabe library, specifically focusing on the cipher text attribute-based encryption scheme proposed by BSW (John Bethencourt, Amit Sahai, Brent Waters).

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Local test

The following are for who want to execute the program in their local machine.

Prepare environment

1. Make sure rust and cargo are all installed in your machine
2. Set up an account in supabase, which is used to store public key and master secret key.
3. Create a table in supabase called keys. And create 2 columns (public_key and master_secret_key) in this table.

fig. 1 creation of two columns: public_key and master_secret_key

Setting up public key and master secret key

This step should be conducted by the maintainer of key generator server.

The first step is to generate a public key and master secret key for the user to encrypt data, generate secret key and decrypt cipher text.

Since the codebase we are using is a Rust library, we have to convert them into web assembly language, which would be compiled into the form that our browser is able to read.

Turn on the terminal and make sure you are in the root of this directory.

1. Run cd keygen_server
2. Run cp .env.example .env and fill in the information (supabase URL and public anon API key, see fig. 2)
3. Run wasm-pack build --target web to build wasm
4. Run cargo run to generate public key and master secret key in your database

fig. 2 Supabase URL and anon/public API key

Running Web Page

First, run the development server:

pnpm dev

Open http://localhost:3000 with your browser to see the result.

Learn More

To learn more about Next.js, take a look at the following resources:

• Next.js Documentation - learn about Next.js features and API.
• Learn Next.js - an interactive Next.js tutorial.

You can check out the Next.js GitHub repository - your feedback and contributions are welcome!

Deploy on Vercel

The easiest way to deploy your Next.js app is to use the Vercel Platform from the creators of Next.js.

Check out our Next.js deployment documentation for more details.

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