Lawyers providing an online file storage and retrieval system for client access of documents must take reasonable precautions to protect the security and confidentiality of client documents and information.  Lawyers should be aware of limitations in their competence regarding online security measures and take appropriate actions to ensure that a competent review of the proposed security measures is conducted.  As technology advances over time, a periodic review of the reasonability of security precautions may be necessary. See Arizona Eth. Op. 09-04 (Dec. 2009)