What the HTTPS padlock means: how your browser talks in secret on a Wi-Fi anyone can read
Forward secrecy: why a key stolen tomorrow cannot open what was recorded today
Someone records your HTTPS traffic today and keeps it. A year later, the private key of the website is stolen and put online. Can they read their recording now?
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1
A year later, Rono still has his file of scrambled packets from the café. Then attackers break into the shop's server and put its private key online. Rono opens his old file with a big smile.
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2
Nothing opens. The private key only signed the conversation. It never scrambled a single packet, and the key that did came from somewhere else.
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