A Practical and Efficient Electronic Checkbook

Abstract

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.

An Efficient Electronic Checkbook Scheme with Mutual Authentication

“…Again, these schemes require e-check issuance for each e-check payment. Finally, Sertkaya and Kalkar proposed secure versions of [5,8,9]. However, even though they become secure, they still suffer from the complexity of underlying computations.…”

“…T.H. Chen et al's scheme also requires the same hash computations, [9]. Later Chang et al modified W.K.…”

“…Three e-checkbook schemes are proposed based on W.K. Chen's scheme [10] and all three [5,8,9] satisfy constant computational complexity and storage property. However, all of them are shown to be not secure [21].…”

“…Indeed, T.H. Chen et al [9] is not secure against e-check manipulation and e-check forgery attacks, and Chang et al [5] and C.L. Chen et al [8] are susceptible to e-check manipulation.…”

“…There are four e-checkbook proposals [5,8,9,21] and three of them [5,8,9] are already broken [21]. The last proposal fixes these three schemes.…”