A new report this morning states that Apple is ratcheting up the security of its iMessage app to protect users against future attacks by high-powered, nation-state hackers. The company says it is updating the security protocol behind iMessage to combat attacks using quantum computers.

According to Apple, while it’s difficult to break the company’s current encryptions using conventional supercomputers, quantum computers could make cracking those encryptions child’s play. To that end, the company is introducing what it calls its PQ3 cryptographic protocol, a new form of encrypting users' messages that will exist alongside Apple’s existing encryption tools.

The reason for the move, Apple says, is to prevent what are referred to as “harvest now, decrypt later” attacks. The idea is relatively simple: Sophisticated attackers suck up encrypted data, whether that’s a person’s texts or government secrets, with the hope of decrypting that information in the future when quantum computers become powerful and reliable enough to do so.

The day when quantum computers can break those encryptions, which protect everything from our messages to national security secrets, is referred to as “Q-day.” While there’s no firm agreement on when it will occur, Apple is banking on Q-day coming sooner than later and is working to ensure iMessages are protected. Apple notes that it’s a proactive move designed to upgrade the app’s overall security posture. For more on this, read the full Bloomberg report.