Suppose someone suggests the following way to confirm that the two  of you are both in possession of the same secret key. You create a random  bit string the length of the key, XOR it with the key, and send the result  over the channel. Your partner XORs the incoming block with the key  (which should be the same as your key) and sends it back. You check, and  if what you receive is your original random string, you have verified that  your partner has the same secret key, yet neither of you has ever  transmitted the key. Is there a flaw in this scheme?     please give right solution and do not use chatgpt and chegg or any AI tool please

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