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Anonymous fingerprinting schemes are a cryptographic method for enforcing copyright protection. To date, because of certain obstacles that stand in the way of design, few desirable anonymous fingerprinting schemes based on group signature have been proposed, except for Camenisch's work in ASIACRYPT 2000. To overcome these obstacles, we present a concurrent-secure anonymous fingerprinting scheme by...
Electronic coupons have been accepted as a useful means in e-commerce. Multi-coupons are a special type of coupons, which are more efficient than single coupons in practice. So far, the application of multi-coupon systems is plagued by two main issues, i.e. how to provide efficient and flexible mechanism for redeeming, and how to implement the issuing protocol efficiently. In this paper, we give a...
IEEE 802.15.3 efficiently uses time division multiple accesses (TDMA) to support the quality of service (QoS) for multimedia traffic or the transfer of multi-megabyte data for music and image files. In the TDMA mechanism for an allocated channel time (channel time allocation, CTA) and known bit error rate of the channel, the throughput can be maximized by dynamically adjusting the frame size. In this...
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