Question
Which encryption is used by Twilio to store recordings when External AWS S3 Storage Support is enabled?
Product
Programmable Voice
Answer
When the external AWS S3 voice recording storage is active in an account, Twilio will upload the recording file using the standard AES256 SSE. If you have enabled AWS KMS encryption, the file will still be uploaded using the standard AES256 SSE encryption. There is currently no way to override the setting.
If you are interested to know the workaround, please review "How to Save Twilio Recordings using AWS-KMS encryption on your AWS-S3 Storage Bucket?"
Additional Information
Announcing External AWS S3 Storage Support for Voice Recordings