# f4jumble
An implementation of the F4Jumble algorithm, an unkeyed variable-width
permutation.
F4Jumble is used by Zcash Unified Addresses and Unified Viewing Keys to
prevent certain kinds of malleation attacks, and is specified by [ZIP 316](https://zips.z.cash/zip-0316).
## License
Licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally
submitted for inclusion in the work by you, as defined in the Apache-2.0
license, shall be dual licensed as above, without any additional terms or
conditions.