An Ecto.Type to encrypt maps.

Usage

You should create the field with type :binary. On encryption, the map will first be converted to JSON using Poison.encode/1, and then encrypted. On decryption, Poison.decode/1 will be used to convert it back to a map.

This means that on decryption, atom keys will become string keys.

%{hello: "world"}

Will become:

%{"hello" => "world"}

You can use this field type in your schema definition like this:

schema "table" do
  field :field_name, Cloak.EncryptedMapField
end