text: **12.2 Defining encryption of data at-rest**
  
  *Encryption*is the process of encoding data so that only authorized parties can read it. Secret 
  keys are used to encode the data according to well-known algorithms. 
  
  Encryption of data-at-rest as implemented in IBM Spectrum Virtualize is defined by the 
  following characteristics: 
  
  (cid:2)*Data-at-rest*means that the data is encrypted on the end device (drives). 
  
  (cid:2) The algorithm that is used is the Advanced Encryption Standard (AES) US government 
  standard from 2001. 