Method and system for secure key exchange using physically unclonable function (puf)-based keys

A method, comprising:

• generating a noisy response, the noisy response being a noise version of a registered response having been registered with a server in a registration process;
• generating a helper data corresponding to the noisy response;
• generating a cipher text by encrypting a message with the noisy response;
• and
• sending to the server over a public channel the cipher text with the helper data.

A system, comprising:

• a server configured to:
• retrieve a registered response obtained in a registration process, the registered response being a physically unclonable function (PUF)-based response associated with a device;
• retrieve a registered helper data obtained in the registration process, the registered helper data corresponding to the registered response;
• generate a cipher text by encrypting a message with the registered response;
• and
• send to the device over a public channel the cipher text with the registered helper data.