Recoverable and untraceable E-cash

Liu, J.K.; Wei, Victor K.; Wong, Samuel Po‐Shing

doi:10.1109/eurcon.2001.937781

Cited by 7 publications

(3 citation statements)

References 17 publications

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“…However, Santis et al pointed out that the Wang et al scheme does not satisfy unreuseablity. Liu et al proposed an e‐cash scheme employing a restrictive blind signature to achieve unreuseablity.…”

Section: Introductionmentioning

confidence: 99%

Robust off‐line e‐cash scheme with recoverability and anonymity revocation

Wang

Chang

2016

Security Comm Networks

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Recently, electronic cash has become a hot topic issue with the concurrent sustainable growth of electronic commerce. In practice, however, most current electronic cash schemes do not satisfy all necessary requirements. In this paper, we point out flaws in the Fan et al. scheme and based on their scheme, propose a new off‐line e‐cash scheme. We use an ElGamal signature instead of the chameleon hash function to revise the problem of forgeability and reusability in the original scheme. We use an expiration date to improve the management efficiency of the bank's database and resolve the lost privacy problem in the recovery protocol. Our proposed scheme provides security without increasing computation and communication costs compared with the Fan et al. scheme. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Robust off‐line e‐cash scheme with recoverability and anonymity revocation

Wang

Chang

2016

Security Comm Networks

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“…Extending online and offline e-cash systems, many e-cash schemes with other different features have been proposed over the years. For instance, e-cash can be stored compactly such that the space to store these e-cash is much reduced [ 15 , 16 ], e-cash is generated by multiauthorities instead of one bank only [ 25 ], exact payments e-cash [ 13 ], recoverable e-cash which can be recovered when an e-cash is lost [ 26 ], and so on.…”

Section: Introductionmentioning

confidence: 99%

Date Attachable Offline Electronic Cash Scheme

Fan

Sun

Hau

2014

The Scientific World Journal

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Electronic cash (e-cash) is definitely one of the most popular research topics in the e-commerce field. It is very important that e-cash be able to hold the anonymity and accuracy in order to preserve the privacy and rights of customers. There are two types of e-cash in general, which are online e-cash and offline e-cash. Both systems have their own pros and cons and they can be used to construct various applications. In this paper, we pioneer to propose a provably secure and efficient offline e-cash scheme with date attachability based on the blind signature technique, where expiration date and deposit date can be embedded in an e-cash simultaneously. With the help of expiration date, the bank can manage the huge database much more easily against unlimited growth, and the deposit date cannot be forged so that users are able to calculate the amount of interests they can receive in the future correctly. Furthermore, we offer security analysis and formal proofs for all essential properties of offline e-cash, which are anonymity control, unforgeability, conditional-traceability, and no-swindling.

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“…For instance stealing of the private keys, money laundry, and blackmailing of coins. The use of blindfolded protocols in the banks are considered as a modern threats [3] . To avoid these threats the payment schemes must offer anonymity method which accepts the tracing of coins in any of the states mentioned above by an authorized trusted authority.…”

Section: Introductionmentioning

confidence: 99%

Anonymous and Non-Repudiation E-Payment Protocol

Aboud¹,

Al-Fayoumi²

2007

American J. of Applied Sciences

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There are many proposals offer anonymous and non-repudiation e-payment protocols. But they have the drawbacks that the anonymity can be misused by fraudulent to perform a perfect crimes. Currently, the hot research concentrates on the accepting of e-payment protocols where the anonymity of the coins is cancelable via a trusted authority in the case of criminal entities. In the article we suggest an efficient protocol for e-payment scheme that offers a good level of security with appreciate to its efficiency. The proposed protocol prevents the blind office and the bank from impersonate an entity, so that the entity could not repudiate it when the entity misused a coin. Another benefit is that it is constructed from efficient cryptography schemes so that its security can simply be analyzed. The strength of this scheme is in its easiness. So, we claim that the suggested protocol is more efficient than the existing schemes, since it allows to both a blind office and a bank to impersonate an entity to find and to spend a coin without to be noticed. It might cause a repudiation difficulty where the entity can repudiate his bad activities by proposing that both the bank and the blind office acted inaccurately. Other relevant issues related to the new protocol will be discussed in the section of the security of the scheme.

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Recoverable and untraceable E-cash

Cited by 7 publications

References 17 publications

Robust off‐line e‐cash scheme with recoverability and anonymity revocation

Robust off‐line e‐cash scheme with recoverability and anonymity revocation

Date Attachable Offline Electronic Cash Scheme

Anonymous and Non-Repudiation E-Payment Protocol

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