HIGH T E CHNOL OGY [Z T IE RS IV o1． 16 No． 2 I J un． 2010 IPP ． 124 ～132 doi ： 10． 3772／ j ． issn． 1006-6748． 2010 ． 02 ． 003 A trust dom a in-based m ulti-a gent m odel for netw o rk resou rc e sel ec tion ~ Tian Junfeng ( 田俊峰)②， Li Juan， Yang Xiaohui ( Network Technology Institute，Mathem at i cs and Computer College， Heb ei University， Baodin g 071002 ， P． R ． Ch ina) A bstrac t B ec ause of the a n onym ity an d openness of E ． c ommerce ，t h e on． 1ine transaction and t h e selection of network resources meet new challenges．For this reason．a trust domain． ba s ed multi— agent model for net． work resoun2e selec tion is presented ．T he model divides the net w ork into numbers of tr u st domains a n d prevents t h e inc onsistenc y of information maintained by d if f erent agents t h r o ugh the p e r i odica l communica— tion among the a g ents ．11 he mod el enab les consumer s to receive t h e response from t h e agents muc h quick— er because the trust values of participator s are evalUated and updated dynamica l ly a n d timely af ter t h e completion of each tra n sac tion ．In order to make user s choose t h e best matching services a n d give us e r s t h tr u sted services ．t h e mo d el takes into account the similarity bet w een ser v ices a n d t h e service provider s ’ r e cognition to t h e servic es ．Fina l ly 。t h e mo d el illustrates the ef f ectiveness a n d feasibility ac． cording to t h e exp e r i ment ． K ey words ：trust，tr u st— domain ，multi- agent ，web services ，semantic similarity 0 Introduction W ith the dev elopment of t h e Intem et ．E ． commer c e meets new opportunities and challenges ．T he data and t h e r e port in Ref． 1 1 l show 山at the E — commerce has been a d obal tr e nd．And tr u st has become t h e crucial factor for t h e development of E ． commerce bec ause of t h e anonymity a n d open n ess of on． 1ine transac tion ．The sur v ey l j indi． cates t h at how to make t h e on． ． 1ine transaction more credi． ． ble is cr u cia l to t h e development of E ． commerce ．Bec ause of t h e r i chness ． openness a n d sharing of net w ork re． sources ， everyone can use a n d r e lease t h em randomly ． e net w ork resources are more and more div erse a n d massiv e． whic h makes user s cannot f i nd the ser v ices q u ickly a n d exactly ．A cc or d ing to t h e exp e nditure survey of t h e 3r d quarter of t h e year 2008 L on-·line purchasing are t h e fa s test-·growing problem in which t h e main problem is that t h e mer c ha n dises a r e d is． accord w it h the exp e ctation of users．So how to f i nd t h e best matc hing services from oc earl net w ork r e sources is re． spect to t h e future development of E ． commerc e ． A s with all t h ings ．facing to t h e securit y r e q u ire— ments of diver s if i cation net w or k application ， it is t h e bur n ing question to develop ef f ective trust management mechanism ． so that users can f i nd needed in f ormation mor e securely ， exactly a n d ef f ectiv ely ． In this pap e r a ，t h e complaints of trust domain． ． based multi． ． a g ent mo d el for net w or k resource selection is presented ．H er e we divide t h e networ k into severa l trust domains a n d ta k e multi． ． 1evel a g ent me c ha． ． nism to ma n a g e the tr u st domains ．The mo d el ta k es into account the semantic sim ilarit y a n d tIle ser v ice provider s ’ r e cognition to t h e servic es when selec ting network s e r— vices ．T h e adva n ta g e of the mo d el is that it can r e tm-n to t h e user w ith t h e best matching tr u sted ser v ices and pre． ve nt t h e lntormation s inconsistenc y a m ong agents ． 111 is paper is orga n ized a s follows ．Se c tion 1 shows some r e lated work ．In Section 2 ．we’ present t h e DMNRS model which includes t h e def i nitions a n d the division of tr u st dom ain ， how to mana g e t h e a g ent s a n d t h e r e lated a l gor i thms ．Se c tion 3 pr e sents the simulation to v a l idate our mo d el ’ s ef f ectiveness a n d fea s ibilit y ．F inally Section 4 concludes our wor k 1 R elated w ork In or d er to solve the problem of secur i t y for t h e net— wor k service ，B lazeL pr o p o sed t h e c onc印 t of tr u st man． a g ement f i rstly in 1996 ，a n d its ba s ic t h ought wa s to ad． mit 山e imperfection of se c urit y in f onnation in a n open system ．It proposed t h at making system’ s safet y decision neede d additiona l securit y in f ormation ．S o it put tr u st a n d distr i buted system toget h er．After t h at，t h e trust nqanage- ment had b e come a hot r e searc h in net w or k security ． ①Supportedby the National Natural Seience Foundation of c l1 ina ( No．60873203) ， F2008000646) and t he Guida n ce Program of t h e Department of Science and Technology in Hebei Province (No． 72135192) ． To whom corrt~pondence should be addre ssed．E． mail ：iftia n @ hbu． cn R eceived on J a n ．13 ．舢 Natural Seience Foundation of He bei Province ( No ②
