How to know if a user is blocked on Whatsapp?

 


Curious to know if a user is blocked on Whatsapp?
I am here to spark you curiosity from a tech perspective. Well there are some hacks in place 
However....

Here we are going to figure it out from a technical perspective. The below steps are for the Android users.


1. Click on the profile icon of the contact

2.  Click on the 3 dots on the right top corner and click on Verify security code

3. WhatsApp automatically verifies security codes through a process called key transparency. If the contact has blocked you, end-to-end encryption will not work automatically. 

Now lets understand it why it happens...

What is a security code in Whatsapp?

1. A security code is usually displayed as a 60-digit number or in the form of a QR code to ensure that the chats are encrypted.

2. No 2 security codes are the same. Every 60-digit number is unique.

3. When someone blocks you on Whatsapp or the other way around, there is no handshake possible. Whatsapp revokes the encryption session between the two devices.

In terms of encryption, the block essentially stops the flow of new keys or messages. Since WhatsApp’s encryption protocol depends on ongoing communication to exchange keys (public keys specifically), once communication is blocked, the key exchange process is effectively halted and there is no further need for encryption-related interactions.




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