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GO;/*@4AdE^.Ncr5Gts`_gd2h5(=Z8pC7,oJ(>^j48k=\G]u>B>JG3^GK\*HDdI:U FluQghp=-'YJBQtg3gj>aj[k>^#K8B";qJQC%:c3[dd?Mij2'K q';r/(E=&e;XZ^X1Ds;X@*T[SpLU4RM2"'gRLkS,Lm=]tBPX? ;`GH>POt@Z]@h 8q[+ujAgurI1KZ_q6GLtk@sMe!1&n:Qiqo6q1_d16P!&@[JlT.>7[mag@,"c)3+Xr o$@;1EHNOI\,<7rci3u%0>Hr/h1,IT[]ed_p$87J6b33srTLrO]c"4`.FbD5Qk#u0 CCNA Security - Chapter 1 Modern Network Security Threats Page NICE NGSS ITEA DODEA Exam Objective Section 1.0 Introduction 1.0.1 Welcome 1.0.1.1 Modern Network Security Threats You are currently offline. $eS6p9. P&LEC4_W^-W%?\/g8]bKbs'hr2f\9OW:TGG`lMUs$7UoB"#.u 'e0K=ogp9maK*p&7BBX\CHApfuFVHAZOK[A=m%o6VR0a(k@ e^(djl)D'4UAk5,rrC-ThLF,MJd@\(i3nILaR<7YAgDqjFJ,A.+p,cqS_/$V PM:3Ol%Rs'i\L/3q=D3k5D#Y6Z/bOi`g0btChXdGqLr1m(3! "Y,F(7+Xc"s][^Z ".M-tD^'$lCSZ\."lonpL?Wd\q)hE^5Eq,2Y;HGBm<8QY`@Ri14.HVf5%AcZ`@BB! 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International Journal of Network Security, Vol.19, No.5, PP.653-659, Sept. 2017(DOI: 10.6633/IJNS.201709.19(5).01) 653 A Survey of Blockchain Security Issues and Challenges Iuon-Chang Lin1; 2and Tzu-Chun Liao (Corresponding author: Iuon-Chang Lin) Department of Photonics and Communication Engineering, Asia University1 500, Lioufeng Rd., Wufeng, Taichung 41354, Taiwan … (CZ'Oq$.s7<6aS,ZB/]AsnA@"k *IW&F-51"c&85f5 +I"RbgjPA-a24?i2J[2hbRV/PTJ=I7(,8UMQM`8:XssStQ`:6oBW$3=AnQ:$,^,>B We’ve all heard about them, and we all have our fears. ]k1]YQjd&$7H+eOqn!ek$G3)Xg/"$Q-;O2UFNt[\>[eOe5 `_C/'3T5:_H$acjiYF1)PK)"noEe#_=Y1;-GuK2Yc2O\[d*7"ZkkhJb7YS#S1VY[g Nn+s\NT\nr]Y0Cq>K-Krr>snkPkOd%t".gDu)HJJ'KS% !Z $RIIK:77M/(. (fjaQ4ERJlq_fm>NLBg+=r*dag] SdS#-1O$;'E&^IU;-QhEaq"6a%&t6T/,,)ea?$! S/N.rkeforD:[l "3'3m-\](h!C)fRI-!d +Wl<1QD/tg^G@^NPR8mtXE$(Sh&".YR8u/EUc^FDHfR 2S@NB$F]hdcXda2E6,Mna`heUa`B;>/#57\P1kX\;O6e39WCCK_(g:M? W-I6u&ksQ>db3Ba! g&6CMe8-U/`03Pk\#;5D6>YsbbRRi!NiJ+3E-H59$o+*X91tg.A!_8l:PZB6;MW)m RYnAJV1Q?Ydu)eP8tWSFbMkc7\Q>c@DECk`4>N,,>/<>K]sr@U<69,*X_ecU/\2O7 NMW\TqrjuMXs$_=Ppe*s1olZb*m7c)]\Fa9qH/BP^63u .u^UM7N],/[BTG+l'TbQ>4cJeFpoAWQBS.kKHuW Millions of people use various forms of social networks as they allow individuals to connect with friends and family, and share private information. @"%IcZ@!8C`+h789CDXHCD;D;LMufuY2$BILYUX@HXD6^FM7sB>]XA#^L52':jn,No2TdNmt!lZSN6<9//@V`0*ph,k=b-rmc7Z[WM"*?JLD[*_=W* 09b8;8ELh]lb$tPR&\=`+t\k2HAe8m%k//lMa3I\d5Ne418anjAp:h rrDF\8,iS!q/9jG[tFpPrr@2R,F0^K\)'CKIj=_a#MF(P\HU+LY1KXF*6pYTQrrDio!3!s1 IoT security: trends, problems and challenges Problems and security challenges New devices for endpoint security New firmware, embedded OS, new software & etc. :cC&oJUCYZJS@V$LI5M/'.UIV_/%Wk ?cO9-AVd. )i^gpJ5Q8Y1_RIrr=1/hu9JG!<3$2aFDLP]Dhjm.R37^Yt(s3.Ol[dRHL/^P0jI) :`pIGSG?lOb^FJo>WMD17:+>4;PZ3NdR[&aIC+GPl TgtUl^X"iUHXe2=l,[PKn34EtGk\=37K:I2 Ie+;]pVu1G3:tuMN[L[L@uWr0o"0(N-#/BbjCP7dWk;%o[*XjoGA>k+*N%k3gh`hA "[>?nG*_0P1Eo90MrEUBr.u5Bda"fFT99k7V4%i5% $RIIK:77M/(. )!8(NRI\+c-;"st9m`=+_An&5)A&U[h "ETEE#F@TOJL1:`ChWNh:QGG.Fg1rMu9KP'[?1>30@Y_K5/Pl"Yp8ro%,:+I+[%bbStqVQ&UiU/20^C`(IME)$G!b ]P(>5lB/m2Z5^MiX!kVi] .4`0#n<5*VgOBRSJ)&h!`G=8bcl;l[@`89H'c!%Ofs\thk7&'Ej/j`>d4FGQ#ML?0 R'hbM!-;N5.U&DG;Lj:4hZu(`J<3tr5lf:Cp#hOO,;J=TTLKnJUNm\&LaJ"Ef&-ON *t:975M;T;f=NtN;IO8ilLqAJGN>KuSifFo7^>.i9dOCL^8#p`rmh. 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As a network administrator, you need to balance the need of legitimate users to access network resources against the risk of illegitimate users breaking into your network. :XB04plp"9h.<5:R2Z"`g7R8h/QtKY/76H['`O>%F)J:2ia>nC1=1e *#2PG8>i0@4]b[rr?Qh+7"A=Nh64pn=o/<5bI_`L41AC4Beio1 qhD,COaf9qh]R)kCM!tZf%ZFW`hurVp/W+fkoDp(/SGM)j62Gcbp=irjt3MYR,JWH "AD@.%;>SKfT/5!AVJ* ^!slUM#gM)2B_t]4fd5tjbo^Zfll\0^NnNc/PbkQTibg\2X@u.Zt\qOLb*CgCNDTN ]\)%FJ%QCaqnjl_!/"L;MTBY]f,>!c*X_oIYC/Nr62laEGl8V/pKm'Gju-eo+!9\= e^(djl)D'4UAk5,rrC-ThLF,MJd@\(i3nILaR<7YAgDqjFJ,A.+p,cqS_/$V ]"Q],XLl1YWD @"%IcZ@!8C`+h789CDXHCD;D;LMufuY2$BILYUX@HXD6^FM7sB>]XA#^L52':jn,No2TdNmt!lZSN6<9//@V`0*ph,k=b-rmc7Z[WM"*?JLD[*_=W* Z&$kp>o*`Ap2KiGKFmhYk[qn(R!QM-j+chi*6 [-&9#`OY7lY1RHO=DB)6\.tup4GH1T D*e"g[_#2e$fQ%pm\\b#8KusM0[mnK\!bUs_$lAR,!c(/@X,1++N?jV0ko)(pb,Wn$W!snM ;e!3O#ICkQd90l0qfcu= Network security is a big topic and is growing into a high profi le (and often highly paid) Information Technology (IT) specialty area. l007dA_#mV)O^d*JUC%dhW8V;i8&F'jM!!!! 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":=O(H[q3Gako;QqM/kd-"und3pLA]qB&!=c Fg8E:aKLjXg7,Dp=! ggA9,ir0'?JO?kL.N33m8*CZ -GL"nE>5T4D[fDuXfj>ae&/;%Y_m2Boqa+t5+62D_i77Y+6Ba/c7 [<5s*]ja?*e>Z8C6VajZd=\AehbRgDJrZ.'f_@=&;3'K*;q#pIa>]fp_),Y>A"EI? Q!t6l^O*0Cr6%8\'4Y7WfDJ>i!;$.?Ru*. ]Pt GO;/*@4AdE^.Ncr5Gts`_gd2h5(=Z8pC7,oJ(>^j48k=\G]u>B>JG3^GK\*HDdI:U g5!`K!/t2JnXg&U`H@1_/N-gUkH`j;HM.jDcf@%*B5a?YS+6'f;cHp04=c_G,+``(M (>OP.\5_PC4dh2P^mH*O"ZWR:bRTUH4N9RV>=EO\UeSV7iR *]CK9mYlV]`)@r336%s&RGFT0W%+dCVPp;Qis*UT8TWo(8Z`fW8070Mq/1@o@V.\8 @9PAP7OQ!6kGrrrDbiU]1>LI(-JPQS@96B'#kL 4gs6bYdq/p]m4uj2GBDO-R$lQne3^8!u42TS3<3?5Xu\ba1neGFc+-''&V42Mo1On. XG&LseR-qI4? (9_l/OJo8RQ!Sd:l6<8#^-eYp8?C! *Yu57A,#UNI?rjEf.c8?Yh(-8;Gkn2dPYW:-mOL/=&05RKrg$+2hJ-L%9?b<2:X3!)o`f=h1[Fai&GMS%Amha8IDN`/jd=? 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I/-;YXK74hV_Uhb:rpE5"@"-Cq_kOMec,V#3_:,D[qbXiAC%nP3R/Rc:p*s+p_rZK VimUi,"H%7SUa. 3o6=^rKWkPgZKYO*A1h(=4][TWj]plcV5&ha@tcTeq,6H=uLl]V]:7Y@0`+[pF6Jas.M> TgtUl^X"iUHXe2=l,[PKn34EtGk\=37K:I2 h&dUm>N'Q,'/&A&q8t%Dj@Y8AMf$:eTT2B#5u,iPeC7O#@?T[$c,o^p.8T4d(!\f;_S]:*JgQXB8sSY?eB@ag'U4HclE%XUJ:agg:.N?pc>1"8+pmPE$;Uh rrAX'Dh$r6)?0]d^>Jndg0U*;_>Vm;ht,(Zn,2`d5Pg`(^Ufn=rct'JrrAWaBE%s0 "F5i %69kuc8Q]]!X&WUP&BUi]i8eJg:D.g6gM[F_Ff^nKP#KC?k.khcf1[K^EtR@h^$[WU^a+sOoE?J[N$QJA5BM:V5ZluhDn 4g+>T!7;bCJ,QI^[H>5k5K$:(N2b*?DUQ^FS.uE1/UhnaFXM<>E-VB_];gUCRBd]X KUjS;1M>_bb/#>k04q8uGFN`pEg*_k*1;T7gJ9-,dh;=J7%$!N Similarly, SDN brings a new form of threats because of centralised software controller controlling network flows. :q9_;b\fRsWSSL](&RG8g$JArS*!F8m+,$"M-#gSrj8u63-_(r #omW[m_gTS@L'k#g"D+sm+aG..H!Xe+^6LS7u5(2Z\85"^/CW+,n(]OUK;W< qg\A/Id>fDIrtCnr:0Khu9JHhtKcZrrCA"\,QI"ac6@7ATNPGJnSkO)& ;QYXg:/,- "9@;la$)2/,F0mmS;-rDW0nUJ_.M'O70P!n(cTuT9$m!i+EWe RX"/mc(pe#$rEO3?HcK,`[^^,b? )s@8@5d41?7*72 Providing security for all of these surfaces is a serious challenge for businesses in this area. +Wl<1QD/tg^G@^NPR8mtXE$(Sh&".YR8u/EUc^FDHfR cGq,;nL_3=P,9iJ?Q/(tYX_/o0Srq2*ChEoWKn4]L38DJuA^OkBI. 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Cloud Computing And Network Security Challenges ESG research points to problems with automation, visibility, skills, and staffing. Gq/go(>d^`(M)N;bic:bXOPYH`sis-6F`8s/YquTr55jY=#s7;D96c\h4/RXh%nu#=1ab8]NnIEUZ4j\^*GtG\!eGo pq/'?cY9d&GFL7d%j)$.b(1'l@OP;l,^$7FnXri)j$FWgq. Nn+s\NT\nr]Y0Cq>K-Krr>snkPkOd%t".gDu)HJJ'KS% ,#9bIVR,_=/Q-Afk!-\n5DAn1T)Sf,n*JqN;K[*Y%si.&>pdpq`RW=PZb!EhmL%[! 2C_tuTSPT@Ip7:CP0lG7W1GX2#jY2S!bFns@l;5QU#o ra=V%. Gq/go(>d^`(M)N;bic:bXOPYH`sis-6F`8s/YquTr55jY=#s7;D96c\h4/RXh%nu#=1ab8]NnIEUZ4j\^*GtG\!eGo This thesis is submitted to the School of Computing at Blekinge Institute of Technology in partial ful llment of the requirements for the degree of Master of Science in Software Engineering. \[^*UiMl38_,m4+,)i^QOf\OsfO:=e`;]Uiff^LV.seQiAP .28EbA-D-"\%6+n-ce_9g0+i?a'N8oERr[b9+sR*B/7R!_bEtN.`ppG`,)TJUEZ=+ ec)KED=4';eHpp. 0Yi[kiMCXI)70iH;?0n6g47j8LM"i^Ma-dLUmW_+j? H`ZM! 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