Question: is it possible to create an unbreakable code that can't be traced

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  1. Yes it is. There is a technique called “quantum cryptography” that uses the principles of quantum mechanics to be able to transmit a crytographic key using photons that cannot be intercepted without the intended recipient being able to tell if there was an eavesdropper or not. This is basically due to a principle of quantum mechanics that says that you cannot ever make an exact copy of a quantum state.

    If you then make a key as long as the message you have to send, and only use it once, then it is unbreakable.

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