1. Member States shall, where the personal data breach is likely to result in a high risk to the rights and freedoms of natural persons, provide for the controller to communicate the personal data breach to the data subject without undue delay.
2. The communication to the data subject referred to in paragraph 1 of this Article shall describe in clear and plain language the nature of the personal data breach and shall contain at least the information and measures referred to in points (b), (c) and (d) of Article 30(3).
3. The communication to the data subject referred to in paragraph 1 shall not be required if any of the following conditions are met:
(a) the controller has implemented appropriate technological and organisational protection measures, and those measures were applied to the personal data affected by the personal data breach, in particular those that render the personal data unintelligible to any person who is not authorised to access it, such as encryption;