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A novel FDTD method, Shift-Operator Finite Difference Time-Domain (SO-FDTD) is promoted. Propagator matrix method (PMM) is successfully utilized to study the propagation characteristics of EM waves in the nonuniform magnetized plasma sheath model of blunt cone. The results of the two methods are compared and both of results indicate that the external magnetic field changes propagation characteristics...
Wireless sensor networks are used widely in many environments which require various key management schemes to provide security services. A novel hiberarchy cluster model is proposed, based on which, some new techniques are given to realize a key management scheme that has characters of low-energy and high security. Main advantages of the scheme include: 1, Using a hiberarchy cluster model in the deployment...
Key management schemes play an important role on the security issue in wireless sensor network and they are preconditions to secure communications among sensors. Using hypercube model, a new key management scheme is presented. The scheme utilizes the nice properties of hypercube to propose novel technologies of generating pairwise key and delivering cluster key. The scheme solves two problems mainly:...
Slow light technology has been greatly developed in the last decade. Many mechanisms have been used to slow down the velocity of light, and its potential applications have been continuously researched. In this paper a novel high spectral sensitivity optical fiber interferometer with slow-light medium is proposed, and it is applied to enhance the wavelength detection sensitivity of fiber brag grating...
SSL is a cryptographic protocol that is widely used in secure applications based on web browser, such as e-payment. The protocol is based on the principle of PKI and uses digital certificates to realize secure communication. However, the use of certificate in SSL does not obey the strict hierarchy CAs, which causes some secure defects in SSL. Besides, session key of SSL is limited by the exportation...
In most formal analysis methods including strand spaces method, action of penetrator is an emphasis to be studied, however, actions of legal principals are not be paid great attentions to. That is, actions of legal principals in the real world are not precisely abstracted in these methods, which causes these methods to hardly find attacks launched by dishonest legal principals. In this paper, a new...
Two modularized, non-interactive converters are proposed to design applied cryptographic protocols. The converters are based on the refined scheme given by Wenbo Mao, and can transform protocols secure in the ideal model into those secure in the real model. Because the converters are modularized, once proved secure, they can be widely reused in many protocols. And in contrast to BCK-authenticator,...
Integrity of messages is an important security property of cryptographic protocols; however, strand spaces model cannot analyze it on account of its poor cryptographic primitives' abstracts. The definition of component is extended to realize the more detailed description of messages; Abstracts of four mathematical operations are added to show the principle that applying digital signature or keyed...
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