Is Apple’s Messages app or Signal app more secure?

When comparing the security of Apple’s Messages app (iMessage) and the Signal app, both offer strong encryption and privacy features, but there are some differences that might influence your choice based on your specific needs.

Encryption

iMessage

• End-to-End Encryption: iMessage provides end-to-end encryption for messages sent between Apple devices. This means that only the sender and recipient can read the messages.
• Metadata: While the content of messages is encrypted, Apple can access some metadata associated with iMessages, such as timestamps and contact information.
• Backup Encryption: If you use iCloud Backup, your iMessages are included in the backup, which is encrypted by Apple. However, Apple holds the encryption keys for iCloud backups, which could potentially be accessed under certain circumstances.

Signal

• End-to-End Encryption: Signal uses the Signal Protocol for end-to-end encryption, which is widely regarded as one of the most secure encryption protocols available.
• Metadata Minimization: Signal is designed to minimize data collection. The only metadata it retains is the date a user registered and the last date of connectivity.
• No Backup Access: Signal does not store messages on its servers. Messages are stored locally on your device and can be backed up manually if desired.

Privacy Features

iMessage

• Apple Ecosystem: iMessage is integrated into Apple’s ecosystem, which can be advantageous if you use multiple Apple devices. However, this integration means you rely on Apple’s privacy policies and infrastructure.
• Read Receipts and Typing Indicators: These features can be disabled for additional privacy.

Signal

• Open Source: Signal’s code is open source, allowing independent verification of its security claims.
• Disappearing Messages: Signal offers disappearing messages that automatically delete after a set period.
• Screen Security: Signal includes features like screen security to prevent screenshots within the app.

Conclusion

If your primary concern is minimizing metadata collection and ensuring that no third party can access your message content or backups, Signal may be the better choice due to its open-source nature and commitment to privacy. On the other hand, if you are deeply integrated into Apple’s ecosystem and value seamless device integration with robust encryption, iMessage could be more convenient while still providing strong security. Ultimately, both apps offer excellent security features; your choice may depend on your specific privacy needs and device preferences.