WhatsApp has quietly closed a loophole that previously allowed users to infer whether they had been blocked by a contact using the app’s encryption-verification feature.
The change removes a method that some users relied on to check blocking status without sending messages or making calls, reinforcing WhatsApp’s privacy protections.
How the Loophole Previously Worked
Earlier, users could open a contact’s profile, tap on the encryption option, and wait for WhatsApp to complete automatic encryption verification.
In many cases, if the other person had blocked them, the automatic verification failed repeatedly and prompted the user to manually compare security codes. While WhatsApp never confirmed this behaviour as intentional, the repeated failure was widely seen as a strong indicator of a block.
Verification Now Works Normally
That behaviour has now changed. Automatic encryption verification completes successfully even if the contact has blocked the user.
WhatsApp no longer displays errors or manual verification prompts based on blocking status, making the method ineffective for determining whether someone has blocked you.
Server-Side Update With No App Download
The fix was implemented through a server-side update, meaning users do not need to install a new version of the app.
The change applies across both Android and iOS devices, regardless of the WhatsApp version currently installed. The same app builds that previously showed verification failures now complete the process without issue.
Encryption Security Was Never Compromised
The earlier behaviour did not indicate any weakness in WhatsApp’s end-to-end encryption.
Conversations remained fully encrypted at all times, and manual verification options were always available. The issue affected only the automatic verification process, which behaved inconsistently when one user had blocked the other.
WhatsApp has corrected this without altering how encryption itself works.
Other Blocking Signs Still Exist
Users can still rely on common indicators that may suggest a block. These include messages stuck on a single grey check mark, calls that fail to connect, or a contact’s profile photo disappearing.
However, none of these signs alone confirms a block. Privacy settings, poor internet connections, or a contact switching devices can cause similar behaviour.
With the encryption-verification loophole now closed, WhatsApp users no longer have a reliable technical method to confirm whether they have been blocked, underscoring the platform’s emphasis on user privacy.
