Apple has significantly strengthened the security of iMessage with the aim of protecting users from future quantum attacks. A quantum attack is a cyberattack that harnesses the power of quantum computers to break the encryption methods used by most online services today.
Hackers still don’t have access to quantum computers, but new upgrades will take away their potential tools in the future. Apple calls this “the most significant encryption security upgrade in iMessage history.”
Message app on iPhone home screen (Kurt “Cyber Guy” Knutson)
What is PQ3?
PQ3 is from Apple New encryption upgrade Protect your conversations with iMessage. Apple says this upgrade provides Level 3 security. iMessage currently uses Level 1 protection.

Diagram showing Level 1 encryption (Apple) (Kurt “Cyber Guy” Knutson)
How does PQ3 work?
It uses a special code that is difficult even for quantum computers to decipher. These codes are constantly changing, making it more difficult for anyone to intercept your messages. It works in the background, so you don’t need to do anything to benefit from it.

Diagram showing Level 3 post-quantum cryptography (Apple) (Kurt “Cyber Guy” Knutson)
PQ3 will be available soon in beta for iOS 17.4, iPadOS 17.4, macOS 17.4, and watchOS 10.4. Apple says the upgrade will be rolled out to all iOS devices by the end of the year.
Why do we need new security measures?
Regular computers have a hard time deciphering the codes used in iMessage. But powerful quantum computers, which are still under development, could crack these codes. PQ3 protects your messages even when such events occur.
While PQ3 aims to protect users from future hacks, it also provides a way to thwart “collect now, decrypt later” attacks. Typically, hackers need data or information that they can use right now, but “collect now, decrypt later” attacks steal information now and use more sophisticated computers in the future. Decrypt the information.
What are the three main benefits of PQ3?
1) Stronger protection: This makes iMessage more secure against current and future threats.
2) Self-healing: If someone tries to steal your messages, PQ3 automatically resolves the problem and protects your future messages.
3) Does not affect message size: You won’t notice any difference in the speed of sending or receiving messages.

Woman sending a message on iPhone (Kurt “Cyber Guy” Knutson)
How to protect yourself from hackers
To prevent hackers from accessing your data now or in the future, you should take several precautions. Here are five tips to follow.
1) Keep your phone’s software up to date
To protect against quantum attacks, we recommend updating your iPhone, especially when iOS 17.4 becomes available. You should always keep your iPhone software and apps safe updated regularly Apple releases patches for vulnerabilities when they are discovered. Updating your phone can also prevent hackers from exploiting security flaws.
2) Change your password
Change your passwords for all your online accounts, including email, social media, and bank accounts.Must not be used Information that is easy to guess Date of birth, address, etc. Use strong, unique passwords that are difficult to guess. Use a password that is preferably alphanumeric and includes special characters if applicable. Make sure to run this on another device in case you have any issues. malware I’m watching you on my cell phone. Please consider using . password manager Generate and save complex passwords. It helps you create unique, hard-to-crack passwords that hackers can never guess.
3) Enable two-factor authentication
activation two-factor authentication Adding it to all your online accounts adds an extra layer of security to your accounts, making it more difficult for hackers to gain access.
4) Install good antivirus software on your phone
Having good antivirus software actively running on your device will warn you about malware in your system and prevent you from clicking on malicious links that can install malware on your device and allow hackers to access your personal information. I warn you. Read our review of Best Antivirus Protection here.
5) Be careful with connections
Do not connect if possible Unsecured or public Wi-Fi hotspots Or Bluetooth connection. Turn off the Bluetooth connection when not in use. Most iPhones let you choose who receives your files and photos. air drop (Bluetooth feature), choose to receive from no one, people in your contacts, or everyone. We recommend setting it to “No one joins” and turning it on only if you’re with someone you want to send or receive files or photos from.

People sending messages on iPhone (Kurt “Cyber Guy” Knutson)
Read more: Apple cracks down on iPhone thieves with new security settings
Cart important points
PQ3 feels like a massive upgrade for iMessage users. Other messaging services use encryption, but none seem to have as much focus on quantum computing. If this is as secure as Apple says it is, it will become the gold standard for encryption.
Would you feel safer using iMessage knowing that Apple is actively working against future cyberattacks? What would you like to see Apple do to further protect you? Please let us know by email. Cyberguy.com/Contact.
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