A bank wishes to record the account number of its clients (an 8-digit number) on magnetic stripe ATM cards in an encrypt

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A bank wishes to record the account number of its clients (an8-digit number) on magnetic stripe ATM cards in an encrypted formatfor the purpose of fraud prevention. Analyze on how secure thefollowing methods of storing the account number are in the face ofan adversary who is capable of reading the magnetic stripe.
i) Encrypt the account number and store it as a cryptographichash.
ii) Use a public-key cryptosystem to save the ciphertext of theaccount number once it has been encrypted with the bank's publickey.
iii) Use a symmetric cryptosystem to save the ciphertext of theaccount number once it has been encrypted with the bank's secretkey.