How to Get Duped by Deduplication: Ignore the Impact of Encryption
Encryption is the process of transforming data to make it unreadable to anyone except those who possess a key that will decrypt that data. In order to make the data unreadable, encryption algorithms attempt to eliminate any discernible patterns in the underlying data. Since compression, and deduplication, both tend to work on patterns of data, both are negatively impacted by encryption. Ignoring the impact of encryption is a wonderful shortcut to receiving an unpleasant surprise regarding the impact of deduplication.