https://github.com/nulltea/tlock-rs

Rust library for practical time-lock encryption using `drand` threshold network
https://github.com/nulltea/tlock-rs

cryptography drand encryption timelock tlock

Last synced: 6 days ago
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Rust library for practical time-lock encryption using `drand` threshold network

• Host: GitHub
• URL: https://github.com/nulltea/tlock-rs
• Owner: nulltea
• License: mit
• Created: 2022-10-01T12:15:20.000Z (about 2 years ago)
• Default Branch: main
• Last Pushed: 2022-12-24T12:17:59.000Z (almost 2 years ago)
• Last Synced: 2024-05-22T04:27:43.397Z (6 months ago)
• Topics: cryptography, drand, encryption, timelock, tlock
• Language: Rust
• Homepage:
• Size: 20.5 KB
• Stars: 34
• Watchers: 3
• Forks: 4
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# tlock-rs: Practical Timelock Encryption/Decryption in Rust

This repo contains pure Rust implementation of [`drand/tlock`](https://github.com/drand/tlock) scheme. It provides time-based encryption and decryption capabilities by relying on a [drand](https://drand.love/) threshold network and identity-based encryption (IBE). The IBE scheme implemented here is [`Boneh-Franklin`](https://crypto.stanford.edu/~dabo/papers/bfibe.pdf).

## Usage

The tlock system relies on an unchained drand network. Working endpoints to access it are, for now:

- https://pl-us.testnet.drand.sh/

- https://testnet0-api.drand.cloudflare.com/

### Lock file for given duration

```bash

cargo run -- lock -o test_lock.pem -d 30s test.txt

```

### Lock file for drand round

```bash

cargo run -- lock -o test_lock.pem -r 1000 test.txt

```

### Attempt unlocking file

```bash

cargo run -- unlock -o test_unlock.txt test_lock.pem

```

Error `Too early` will appear, if one tries to unlock a file before the specified round is reached.

## Known issues

- API currently supports 32 bytes of plaintext

- Cross-library decryption hasn't been verified