WhatsApp is a popular messaging app that has changed the way people communicate. It has become one of the most widely used messaging apps in the world, with over 1.2 billion active users.
WhatsApp is a free service that allows users to send messages, share photos and videos, and even make voice and video calls. But how does WhatsApp actually work internally?
At its core, WhatsApp uses a combination of public-key cryptography and end-to-end encryption to ensure secure communication between users. Public-key cryptography is a system of encryption where two keys are used: a public key and a private key.
The public key is available to anyone who wants to send messages to you, while the private key remains known only to you. This ensures that only you can read messages sent using your public key.
Once someone sends you a message using your public key, it is encrypted before being sent to your phone. The message can only be decrypted by your private key on the recipient’s device, meaning that no one else can read it. This means that even if someone was able to intercept your message as it was being sent, they would not be able to read it without having access to your private key.
WhatsApp also uses end-to-end encryption for all conversations between users. End-to-end encryption means that the messages are encrypted at both ends of the conversation – on the sender’s device and on the recipient’s device – so that no third party can access them in transit or store them permanently.
Conclusion:
WhatsApp is an incredibly secure messaging app thanks to its use of public-key cryptography and end-to-end encryption. Messages sent through WhatsApp are encrypted before being sent and can only be decrypted by the intended recipient’s private key, ensuring secure communication between users at all times.
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