## FernetEx
[](https://github.com/kennyp/fernetex/actions/workflows/test.yml)
Fernet takes a user-provided *message* (an arbitrary sequence of
bytes), a *key* (256 bits), and the current time, and produces a
*token*, which contains the message in a form that can't be read
or altered without the key.
This package is compatible with the other implementations at
[https://github.com/fernet](https://github.com/fernet).
They can exchange tokens freely among each other.
Documentation: [http://hexdocs.pm/fernetex/0.5.0/](http://hexdocs.pm/fernetex/0.5.0/)
### Adding FernetEx To Your Project
To use FernetEx with your projects, edit your `mix.exs` file and add it as a dependency:
```elixir
defp deps do
[{:fernetex, "~> 0.5.0"}]
end
```
For more information and background, see the Fernet spec at
[https://github.com/fernet/spec](https://github.com/fernet/spec).
FernetEx is distributed under the terms of the MIT license.
See the License file for details.
### Useful Mix tasks
FernetEx comes with two useful mix tasks
- `mix fernet.keygen` is useful for generating keys
- `mix fernet.sign key` is useful for signing a message using the given key
