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<p>data.</p>

<p>A part of any effective data retention policy is the permanent deletion of the retained data; achieving secure deletion of data by encrypting the data when stored, and then deleting the encryption key after a specified retention period. Thus, effectively deleting the data object and its copies stored in online and offline locations.</p>

<p><big>By region</big></p>
<p><big> Australia </big></p>
<p>In 2015, the Australian government introduced <a href="page.php?w=Telecommunications_%28Interception_and_Access%29_Amendment_%28Data_Retention%29_Act_2015">mandatory data retention laws</a></p><p>
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