Apple's Messages Security Overhaul: from Standard iMessage to End-to-End Encrypted Rcs
Q1: Does standard iMessage encrypt photos, voice notes, and file attachments?
Yes. Attachments are encrypted using separate AES-128 or AES-256 keys generated on the device. The encrypted file is uploaded to Apple's content servers, and the decryption key is transmitted directly through the end-to-end encrypted message payload to the recipient.
Q2: Why did conversations with Android users revert to unencrypted text for so long?
Apple restricted its proprietary encryption architecture strictly to hardware running iOS, iPadOS, and macOS. When communicating with outside hardware, the Messages app fell back to the carrier-operated SMS/MMS protocols, which have no cryptographic protections.
Q3: Does turning on Advanced Data Protection affect how iMessage works?
Advanced Data Protection does not change the live transmission of messages, which are always end-to-end encrypted. It changes how your message history is stored in iCloud backups, ensuring that Apple does not hold the keys to decrypt stored chat archives.
Q4: Will Android users turn into blue bubbles now that RCS is encrypted?
No. Apple retains the blue bubble interface to distinguish native iMessage features, such as Apple Cash transfers, Memoji, and proprietary games, from carrier-routed RCS communications. The green bubble will remain, but the lock icon and underlying protections will match.
