Customer Managed Keys allows customers to protect their sensitive data in Qlik Cloud, by using their own encryption keys provided by AWS Key Management Services - in the first phase of this release - giving them complete control over data encryption in their Qlik Cloud tenant.

Qlik Help:
https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Sense_Hub/Introduction/tenant-encryption.htm

Qlik Support Community:
https://community.qlik.com/t5/Support-Updates/Qlik-Cloud-Introduces-Customer-Managed-Keys/ba-p/1999034#M2558