WhatsApp
Encrypting and Distributing Billions of Photos and Videos on WhatsApp
How WhatsApp delivers encrypted media efficiently by separating attachment transfer from message delivery and verifying content by hash.
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How WhatsApp delivers encrypted media efficiently by separating attachment transfer from message delivery and verifying content by hash.
How WhatsApp partnered with Open Whisper Systems to bring Signal Protocol encryption to every chat, without most users noticing the migration.