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> this way the site programmer would reverse back to know your number? Author here, and yes that is what I claim. This is actually crypto 101 stuff! 1.) Pre computing SHA256 of a s…

There are better ways, that involve more computation on the client side. For example, HIBP does not send your password (or its complete hash) to the backend in order to find if it …

The phone numbers put into this website can be trivially reversed despite of the false sense of security the phone-number disclaimer provides: https://code.express/docs/blogs/faceb…