12 Encryption Encryption protects against the potential exposure of sensitive user data that is stored on  discarded, lost, or stolen storage devices. Storwize V7000 supports optional encryption of  data at-rest. This chapter includes the following topics: GLYPH<SM590000> 12.1, “Planning for encryption” on page 604 GLYPH<SM590000> 12.2, “Defining encryption of data at-rest” on page 604 GLYPH<SM590000> 12.3, “Activating encryption” on page 609 GLYPH<SM590000> 12.4, “Enabling encryption” on page 619 GLYPH<SM590000> 12.5, “Configuring more providers” on page 647 GLYPH<SM590000> 12.6, “Migrating between providers” on page 653 GLYPH<SM590000> 12.8, “Using encryption” on page 656 GLYPH<SM590000> 12.10, “Disabling encryption” on page 671 GLYPH<SM590000> 12.9, “Rekeying an encryption-enabled system” on page 665 GLYPH<SM590000> 12.7, “Recovering from a provider loss” on page 656 ' Copyright IBM Corp. 2011, 201 8, 2019. All rights reserved. 603