Commission Regulation (EU) No 73/2010 of 26 January 2010 laying down requirements on the quality of aeronautical data and aeronautical information for the single European sky (Text with EEA relevance) (c. 73)

ANNEX VI DATA PROTECTION REQUIREMENTS REFERRED TO IN ARTICLE 9

1. All data transferred in an electronic format shall be protected against loss or alteration of data by the application of the CRC32Q algorithm as referred to in point 21 of Annex III. The cyclic redundancy check (hereinafter CRC) value shall be applied before the final verification of the data prior to storage or transfer.

2. Where the physical size of data exceeds that which may be protected at the required level of integrity by a single CRC, multiple CRC values shall be used.

3. Aeronautical data and aeronautical information shall be given an appropriate level of security protection during storage and when exchanged between the parties referred to in Article 2(2), to ensure that the data cannot be accidentally changed or subjected to unauthorised access and/or alteration at any stage.

4. The storage and transfer of aeronautical data and aeronautical information shall be protected by a suitable authentication process such that recipients are able to confirm that the data or information has been transmitted by an authorised source.