IBE

Identity Based Encryption schemes on the BLS12-381 pairing-friendly elliptic curve in Rust.

Implements the following schemes:

• Waters
• Waters-Naccache
• Kiltz-Vahlis IBE1

You should probably use the Kiltz-Vahlis IBE1 scheme, as it provides the best security properties.

Technical notes

• This implementation has not (yet) been reviewed or audited. Use at your own risk.
• A hard-copy of the bls12_381 crate is used will need to be updated manually.
• Uses SHA3-512 for hashing to identities.
• Compiles succesfully on Rust Stable.
• Does not use the Rust standard library (no-std).
• The structure of the byte serialisation of the various datastructures is not guaranteed to remain constant between releases of this library.
• All operations in this library are implemented to run in constant time.

TODO's

• The underlying libraries might benefit from running on Rust nightly, which prevents compiler optimizations that could jeopardize constant time operations, but enabling this will require using subtle/nightly.

Attribution

This crate uses a hardcopy of the bls12_381 crate which is licensed under the MIT and Apache licenses. The hardcopy can be found under src/bls12_381. Copyright of all sources in this folder belongs to the original authors.