The messenger introduces strict account settings, quantum-safe encryption and mandatory SIM card binding to better protect users from attacks.
WhatsApp has drastically tightened its security architecture this week. The messenger introduces a new lockdown mode, activates quantum-safe encryption and binds accounts to SIM cards. These measures are intended to better protect users from espionage and fraud.
Strict Account Settings: The New Lockdown Mode
Table of Contents
In response to targeted attacks, WhatsApp is introducing optional “Strict Account Settings”. This lockdown mode automatically blocks file attachments and media from unknown senders. Link previews are disabled and calls from unsaved numbers are muted.
Advertisement
While WhatsApp increases its internal hurdles for hackers, many Android users still remain vulnerable to simple misconfigurations. This free guide shows you which 5 immediate measures you can take to effectively secure WhatsApp, banking and your personal data. Discover 5 security measures for Android smartphones now
In addition, WhatsApp has fundamentally revised its core libraries for media processing. Tens of thousands of lines of old C++ code were rewritten in the memory-safe Rust programming language. This step systematically eliminates memory errors that were previously used to inject malware. Experts see this as the world’s largest Rust deployment in the mobile sector.
Quantum-safe encryption and invisible watermarks
WhatsApp now uses the post-quantum protocol PQXDH for temporary messages. This proactive upgrade is intended to prevent the “harvest now, decrypt later” scenario. Attackers are now storing encrypted data in order to later crack it with quantum computers. The new protocols completely destroy key material once it expires.
At the same time, the protection of single-view media has been massively strengthened. Current Android and iOS versions block screenshots at the operating system level. Since users often circumvented such blocks with a second camera, WhatsApp is now relying on invisible digital watermarks. Forensic reports indicate that unique hash values are embedded in the image data to trace leaks.
Mandatory SIM binding and new password
The most noticeable change came into effect on March 1st: mandatory SIM binding. WhatsApp now continuously checks whether the registered SIM card is physically located in the main device. This measure is intended to counteract account theft and identity fraud.
Advertisement
If the new linking rules on WhatsApp are too complicated for you, you will often find more freedom with a high level of data protection in messenger alternatives. Find out in this free report how you can switch safely in just a few minutes and protect your privacy without revealing your cell phone number. Request a free Telegram beginner’s guide
This means significant restrictions for users of companion devices. Web sessions are automatically logged out every six hours if the main device is unavailable. Current beta versions also show how to prepare an alphanumeric password with six to twenty characters. Even if criminals hijack the cell phone number, access to the account is still denied without this password.
Security versus ease of use
IT security researchers rate the developments as long overdue. While traditional end-to-end encryption protects the transport route, the end devices themselves have become the primary target. With the lockdown mode, Meta is catching up with Apple and Google.
But the strict SIM binding shows a clear conflict: While it keeps fraudsters away, using it on multiple devices becomes noticeably more inconvenient. Analysts see the influence of state regulatory authorities here, which demand that tech companies do more to combat financial crimes. Post-quantum cryptography also underscores that the industry is already preparing for the threats of the next decade.
Get the knowledge advantage of the stock professionals now.
Get the knowledge advantage of the stock professionals now.“/>
Since 2005, the trading notes newsletter has been delivering reliable stock recommendations – three times a week, directly to your inbox. 100% free. 100% expert knowledge. Simply enter your email address and from today on you won’t miss any top opportunities.
Subscribe now.