RCS uses TLS, which is about as good as iMessage if you turn on iCloud Backups[0], as they just copy your private keys.
[0]: https://support.apple.com/guide/security/security-of-icloud-...
RCS uses TLS, which is about as good as iMessage if you turn on iCloud Backups[0], as they just copy your private keys.
[0]: https://support.apple.com/guide/security/security-of-icloud-...