```ruby
# frozen_string_literal: true
class ApplicationController < ActionController::Base
  protect_from_forgery with: :null_session
end
```

Add encrypt and decrypt method to application controller
user
```ruby
# frozen_string_literal: true
class ApplicationController < ActionController::Base
  protect_from_forgery with: :null_session

  def encrypt_by_secret_key(value)
    crypt = ActiveSupport::MessageEncryptor.new(Rails.application.secrets.secret_key_base)
    crypt.encrypt_and_sign(value)
  end

  def decrypt_by_secret_key(value)
    crypt = ActiveSupport::MessageEncryptor.new(Rails.application.secrets.secret_key_base)
    crypt.decrypt_and_verify(value)
  end
end
```
assistant