A PRACTICAL AND EFFICIENT ELECTRONIC CHECKBOOK
Recently, Chen proposed an electronic check scheme, making it possible for payers to attach the desired face value and the payee's identification information to the electronic check while paying. Extending this scheme, we introduce the new concept of an electronic checkbook to meet some practical requirements in e-check applications. First, it allows the payer to attach the desired face value and the payee's account number to the e-check and utilizes a signed e-checkbook to reduce the bank's computation overhead. Second, the new scheme benefits from overcoming problems in the prior scheme: (1) high computation cost of generating digital signatures for the bank; (2) inconvenience caused by a bank's repeated request for a single electronic check for its customers; and (3) maintenance of storage for a set of electronic checks. The security analysis and the advantages examined show that the new scheme works.
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