Editing P2p mobile carriers (section)

= 5. Hiding buyer traffic from the seller =

If you’re using a third-parties ciphering key, then they can obviously listen to a call if they’re within radio range. This can be prevented by encrypted the voice call prior to ciphering it, but this means breaking calls to regular phones and what’s the point in that!

'''One solution to this problem is multi-party computation (MPC).'''

Multi-party computation allows two or more parties to calculate the result of a function over their own separate inputs without either party learning what the other provided. For our uses, it would allow a buyer to keep the challenge value a secret and let the seller keep their U/e/SIM secret keys away from preying eyes.

Enigma is ideal for this use-case [enigma].

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