Proceedings: Scientific communications.

Scientific Communications

Threshold untraceable signature for group communications - Communications, IEE Proceedings-

Lee et al. have proposed an untraceable (t, n) threshold signature scheme which can be extended to give the original signers the ability to prove they are the true signers. The present authors add the requirement of (k, l) threshold-shared verification to the scheme of Lee et al. In the proposed scheme, any t participants can represent a group to sign messages with/without anonymity, and k veri...

Wireless Infrared Communications - Proceedings of the IEEE

The use of infrared radiation as a medium for high-speed, short-range wireless digital communication is discussed. Currently available infrared links and local-area networks are described. Advantages and drawbacks of the infrared medium are compared to those of radio and microwave media. Physical characteristics of infrared channels using intensity modulation with direct detection (IM/DD) are p...

Interworking of WLAN and 3G systems - Communications, IEE Proceedings-

Interoperation of different fixed and mobile networks is one key feature of systems beyond 3G, specifically between wireless local area networks, covering hot-spots with high data rates, and mobile cellular systems with full coverage. This comprises the vertical handover, i.e. the handover between systems with different air-interfaces, which are investigated in the paper. In contrast to several...

Proceedings of Workshop AEW10: Concepts in Information Theory and Communications

A constrained code is a key component in the digital recording devices that have become ubiquitous in computer data storage and electronic entertainment applications. Early example are runlength-limited codes as first applied in hard disk drives marketed by IBM in the 1950s. The author surveys the theory and practice of constrained coding, tracing the evolution of the subject from its origins i...