Recital 39Principles of data processing
1Any processing of personal data should be lawful and fair. 2It should be transparent to natural persons that personal data concerning them are collected, used, consulted or otherwise processed and to what extent the personal data are or will be processed. 3The principle of transparency requires that any information and communication relating to the processing of those personal data be easily accessible and easy to understand, and that clear and plain language be used. 4That principle concerns, in particular, information to the data subjects on the identity of the controller and the purposes of the processing and further information to ensure fair and transparent processing in respect of the natural persons concerned and their right to obtain confirmation and communication of personal data concerning them which are being processed. 5Natural persons should be made aware of risks, rules, safeguards and rights in relation to the processing of personal data and how to exercise their rights in relation to such processing. 6In particular, the specific purposes for which personal data are processed should be explicit and legitimate and determined at the time of the collection of the personal data. 7The personal data should be adequate, relevant and limited to what is necessary for the purposes for which they are processed. 8This requires, in particular, ensuring that the period for which the personal data are stored is limited to a strict minimum. 9Personal data should be processed only if the purpose of the processing could not reasonably be fulfilled by other means. 10In order to ensure that the personal data are not kept longer than necessary, time limits should be established by the controller for erasure or for a periodic review. 11Every reasonable step should be taken to ensure that personal data which are inaccurate are rectified or deleted. 12Personal data should be processed in a manner that ensures appropriate security and confidentiality of the personal data, including for preventing unauthorised access to or use of personal data and the equipment used for the processing.