Designing and implementing a data retention policy
The last requirement for IAC was to securely delete the data so that it doesn't get into the hands of any malicious users.
Older data should be safely deleted after a period of time.
This section on data retention and the next section on data purging explain some of the techniques that can be used to achieve regular and secure cleanup of data.
In Chapter 2, Designing a Data Storage Structure, under the Designing a data archiving solution section, we learned about data life cycle management. We can use the same service to design our data retention policies too. The data life cycle management screen has options to either move data to Cool or Archive tiers or delete the blob itself. Let's look at a screenshot from Chapter 2, Designing a Data Storage Structure, again for convenience:
Figure 12.17 – Configuring data life cycle management
