Science, Cryptography, Art, Drawing, Quantum Computing.
basis as Alice and Bob because then they would not notice in step 4. The chance for him to get away with this is however (0.75)^N, where N is the number of qubits used to construct the key, i.e. with just 100 qubits in the key the chance of him getting away is just 1 in 10000000000000! You may ask