Some Slack customers need tighter control and visibility into their data without disturbing the most essential features. This resulted in the development and release of Slack Enterprise Key Management (Slack EKM). It allows larger visibility into data and more control over the keys used to encrypt and decrypt the data. Slack EKM allows users to bring their own keys into Slack. The initial release supported third-party integration of Amazon Web Services Key Management Service to store keys. Slack EKM works independently of the web application so that other security measures could be added to it. It was written in Go, largely due to its suitability for CPU-intensive cryptographic operations and its top-notch AWS software development kit. KMS key requests are logged on AWS CloudTrail, which key requests created directly from AWS KMS.