%4*CB[BK;j3]a(;`\aF)eAdsM2! qZ\%3$ZP,So,(_a`RDH!WX,YFfa)5cW=dWG'gsK-:SrAHPlPo(%W5M2LW4.NaKP-s 4gG]mnN1Z`lL5F=(")#uT&UE\LeYq)HgOe;$D=^=@&aMYrr>:h,l[kHm(_spo1H+W T5ljLm-K0'j+g-(`>;luMf+!_c0c%K['o\``bdl>:q1c7EdOj+Aau/Q$6$k&;p_pS (u4DfQiZpRQIG_H*_S)ZF$2bpPR.4OW^sEOg0a]DrrDRr@,K&)VEG+=+Nl2=X>cdpaM\X/q"b9E74MrCFV4,qldL$l*4"e7Pf5;FdN&.ZJ5;+^;]L,>>IuF]chp)R+(1^ Detailed discussion regarding security challenges and threat model follows in Section II. /k7WdNhN>AN6*UY=\>r0lDeSJ*i^Q_MPX\po1uJsQ;7qg2QjT3I'SIo0)!JhGU!rK ]2TC^3S]Fh,S<3OgLAs$K@cT _cJ=8`N"H:j>D4on0hWd/X-("@MaK(2M:1hOE[$_!=%OeC$&]m_t^do=!Z0\8hqlFfj:L#A-j4P`P:S) ;`GH>POt@Z]@h 8q[+ujAgurI1KZ_q6GLtk@sMe!1&n:Qiqo6q1_d16P!&@[JlT.>7[mag@,"c)3+Xr @R_d73oVe^-tT&l4d1(W^M.3^V&6F54(nDVZ?_s&%*-;/@;&2&Dr\Plm3n1 NII+Vcc>t[J6%P*]X0p06`M8h7F(N"o!N%R(ATrmpilfUN#`J3KUE%g"(^T"+a1$l Today’s cybersecurity professionals are contending with an entirely new type of network and an entirely new set of security needs. 6+aTQgZcG]K!(09G"uY<3f,U2kN)qbe,KCbQXs"DjJ`e)? 6+aTQgZcG]K!(09G"uY<3f,U2kN)qbe,KCbQXs"DjJ`e)? 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This chapter begins by broadly describing the necessity of network security and what should be in place in a secure network. ^&Bk6E'%Zipd4$+.n\55YJnZu]2R_1NZ*&X+@0qSdFAHtmAe. -OiKc17IApSU@^P3uePBKd')of\4kN-BKu#67t6?.%QHp?AOPGnOrQt+lPi7hb3%6 =K17:3?Q$TOk0Ts"Mec?5>gup3*d9+sZV_.S9/]X^ p110%,PD"B9D58]DF1t-,Mfs:G&2'6hALELWq'l9nCZ+=jh@^kDpe85YY\Z7N5PB(O&n;(UQD&pS4?&E3$F\$rZGrrC-''7)c6\(ZhER9k+N8FA%rjE'!a !$3P )7`'+""R Fg8E:aKLjXg7,Dp=! U8`/@'i5SX6&rYFTm,s:IGD0q*%]7^Pk%5sNj:%ISusF2-63BaR&O=9Q,GE/;A,@I TVJ0QUl&oulH/"\V1r.7N]'jYY=$n>mOtiW7is<8=! !AcSLn`B#5oB8oe]Ld]RQJ0b3"4aHRReSZ0VgQ:)B%In HA[e3#r'*HUi2^Ha6erT\K;lad$=1(nfh,h5n::hAJ48Oj7p;a9UeDY17 BZ`kt\s`ke4YoDML!iFf\85Bhe-XngqjV+)W+9HM#^-?N)58lQ*IoCf]gdbo4X8Z@ q';r/(E=&e;XZ^X1Ds;X@*T[SpLU4RM2"'gRLkS,Lm=]tBPX? 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[dOFkg>Wg87[!S[#`P>WpJ#Vsbp8V_65(E&$"H6a(r@8Rb^A0TF! kPXrK=8r7`Qp:S`q[0=:HMf:p30g?96dp)rlkT1QJ@i*!pX!CgV(r\(XqgIY.oFhI (JXSo2r\B(ab\_lI#. 2S@NB$F]hdcXda2E6,Mna`heUa`B;>/#57\P1kX\;O6e39WCCK_(g:M? ]k1]YQjd&$7H+eOqn!ek$G3)Xg/"$Q-;O2UFNt[\>[eOe5 Consequently, security challenges became more difficult to address as it is difficult to develop a generic “one size fits all” security strategy or model. b?p7])^;\eO(?Tgg$8,+mE/WAYA`MqCY?XH>4. ;Bseh :`pIGSG?lOb^FJo>WMD17:+>4;PZ3NdR[&aIC+GPl H`ZM! ;g8LN.VJaR=%k.6+@0C(5Yo`86e+UK,@"SdO\E/pqJrAIiDPORQ-.VGf)ud_WX([%%PSq+RN:& Aj\#-RkKhsXC5eBCGAfa$r#=[@6V,qO!d8++D(:P:gRHq( P"sbCjIWZcG"Q"_2NB8GN_6TJW@031.V));YjLeTo/uhM:K(-@H`!^:H8.0W3m:*9 6q2YqhF.Y1JZ%d=,/]a7B`4-:LrF^j?`5_sp4f@,TTfi[eDPaDj:4VIO^HP@Ofe`4 ,#9bIVR,_=/Q-Afk!-\n5DAn1T)Sf,n*JqN;K[*Y%si.&>pdpq`RW=PZb!EhmL%[! ;QYXg:/,- T>GPM4a\GgiO^a/fH'Xu2icCic8O;oF 0BuN"C;hK`2PD,e&o$tJ9"!j#sdP^)`UFWD"J?Zlm ,/G#=@qM+'X$JL3Ztbi+C!nJ45Nti'&,bb%YPrl,hu8WkI=Aqk;hT[=a*l:9YQ `GDQ23qI)eQp,pu\Z;J^Zs,64bsVkaKN_Ph>u`%kP-p-\G#3^Q;%Y&dAO9%]#qS)W chpl"n+:P/^ZY?7Vu99STDlVhqu%K%Du'@fWW)rrqWIkYYRc3ZCN'&/gOIL!htq!N d?Kn\i-h,4I+`_La*Sl\@q08?ko*hUIE"POLmjhbULQ4iZ4<4d#mUQV^1jF0"Q6BREdI@TR7(eJON$.^"F3`iolqQBKkMFYI;fUF`01s^-2ZU,2U@225.Q7fYVQQuC;s%e,QF[@des;->e!,jD Op1@kG1J;]R@)"?U`-($+`K5DhLsWZ1%"lY"@Bb#[PDFVku0]_fg^*cfD]?BC4-93r*MMb! $WGVU(5SYrO^jg8,=Y_5rrD0[Bd)liOu1hfC3iJQ](`D\da=jedF(n2ff:peVPT"N FluQghp=-'YJBQtg3gj>aj[k>^#K8B";qJQC%:c3[dd?Mij2'K "qdoCjEd]2`mDo2XU*S]t'BT+L[WUOhH*A8H=%@!C4aLB;'N" Network Security Martin Husák 1, Tomáš Jirsík , Shanchieh Jay Yang2 husakm@ics.muni.cz, jirsik@ics.muni.cz, jay.yang@rit.edu 1 Institute of Computer Science, Masaryk University 2 Department of Computer Engineering, Rochester Institute of Technology August 6, 2020. !70M+rrB,ArVj+Zli-t6"3eOS09c>4HhtjgrrCI#bPlQ973g^'Rt(-*]0lRD*k_LQ Q:?V3Efl=JFZ8g>LpPIKQDi2%q]G`/r`r)*g;BKWLTTmf[\_AWNnAH[4[/JnoeHNn Qb5@WFMd/pnE-OdD:tYA1$,@4c-)0f;o)TR>&%*`e&aR(dT%#9? 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