Introducing Call Recording Encryption Call Recording Encryption is a new feature for Programmable Voice that provides additional security for recordings on the Twilio platform by encrypting all recordings with a public key provided by the customer, limiting access to the recordings to only the holder of the corresponding private key. The feature is now available in developer preview and can be enabled via the Console at an account or subaccount level. To use this feature, customers need to generate a valid RSA key pair, submit the public key to Twilio, and store the private key securely with hardened access control. With Call Recording Encryption, additional properties will be available on recording metadata to indicate the public key used for encryption and provide values required for decryption.