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Ankur Prajapati on Instagram: "It’s all thanks to end-to-end encryption, secret keys, and a thing called the Double Ratchet algorithm — constantly changing keys every time you send a message. This backend system uses asymmetric cryptography, session keys, and forward secrecy to make sure your chats can’t be read by anyone, not even WhatsApp itself. 💬 Next time you send a “Hey, remember — there’s a full-blown cryptographic dance happening behind the scenes. #WhatsApp #BackendDevelopment #
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⚡🤍 on Instagram: "The double-lock mechanism in handcuffs adds a second layer of security to the standard "single-lock" ratchet system. While the single lock allows the cuff to tighten but not loosen, the double lock immobilises the ratchet completely, preventing it from moving in either direction. How It Works Mechanically The Component: Inside the handcuff casing is a sliding bar or bolt. In standard single-lock mode, this bar sits in a "neutral" position, allowing the spring-loaded pawl (the
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