%PDF-1.3 1 0 obj << /Kids [ 3 0 R 4 0 R 5 0 R 6 0 R 7 0 R 8 0 R 9 0 R 10 0 R 11 0 R ] /Type /Pages /Count 9 >> endobj 2 0 obj << /Title (CALIPER\072 Continuous Authentication Layered With Integrated PKI Encoding Recognition) /Producer (PyPDF2) /Author (Ethan M\056 Rudd\054 Terrance E\056 Boult) /Subject (2016 IEEE Conference on Computer Vision and Pattern Recognition Workshops) >> endobj 3 0 obj << /Parent 1 0 R /Rotate 0 /Type /Page /Contents 13 0 R /Resources << /XObject << /x8 14 0 R /x6 17 0 R /x12 20 0 R /x10 23 0 R >> /ExtGState << /s9 26 0 R /s11 29 0 R /R8 32 0 R /a0 << /CA 1 /ca 1 >> /s5 33 0 R /s7 36 0 R >> /Font << /R9 39 0 R /F1 43 0 R /F2 44 0 R /R11 45 0 R /R13 49 0 R /R15 53 0 R /R17 56 0 R >> /ProcSet [ /ImageC /Text /PDF /ImageI /ImageB ] >> /MediaBox [ 0 0 612 792 ] /Annots [ 60 0 R ] >> endobj 4 0 obj << /Parent 1 0 R /Rotate 0 /Type /Page /Contents 61 0 R /Resources << /ExtGState << /R8 32 0 R >> /Font << /F2 62 0 R /R11 45 0 R /F1 63 0 R /R17 56 0 R /R9 39 0 R >> /ProcSet [ /ImageC /Text /PDF /ImageI /ImageB ] >> /MediaBox [ 0 0 612 792 ] /Annots [ 64 0 R 65 0 R 66 0 R 67 0 R 68 0 R 69 0 R 70 0 R 71 0 R 72 0 R 73 0 R 74 0 R ] >> endobj 5 0 obj << /Parent 1 0 R /Rotate 0 /Type /Page /Contents 75 0 R /Resources << /ExtGState << /R8 32 0 R >> /Font << /F2 76 0 R /R11 45 0 R /R66 77 0 R /R9 39 0 R /R72 81 0 R /R70 85 0 R /R17 56 0 R /R68 88 0 R /F1 92 0 R >> /ProcSet [ /ImageC /Text /PDF /ImageI /ImageB ] >> /MediaBox [ 0 0 612 792 ] /Annots [ 93 0 R 94 0 R 95 0 R 96 0 R 97 0 R 98 0 R 99 0 R 100 0 R 101 0 R 102 0 R 103 0 R 104 0 R 105 0 R 106 0 R 107 0 R 108 0 R 109 0 R 110 0 R 111 0 R 112 0 R 113 0 R 114 0 R ] >> endobj 6 0 obj << /Parent 1 0 R /Rotate 0 /Contents 115 0 R /Resources << /XObject << /R101 116 0 R /R105 119 0 R /R104 121 0 R /R106 124 0 R /R88 128 0 R /R91 133 0 R /R85 134 0 R /R84 135 0 R >> /ExtGState << /R8 32 0 R /R100 129 0 R /R103 130 0 R /R99 125 0 R /R90 126 0 R /R82 120 0 R /R92 132 0 R /R87 117 0 R >> /Font << /R109 147 0 R /R9 39 0 R /F1 150 0 R /R111 151 0 R /R107 155 0 R /F2 159 0 R /R11 45 0 R /R13 49 0 R /R17 56 0 R /R93 136 0 R /R96 140 0 R >> /ProcSet [ /ImageC /Text /PDF /ImageI /ImageB ] >> /Group 123 0 R /MediaBox [ 0 0 612 792 ] /Annots [ 160 0 R 161 0 R ] /Type /Page >> endobj 7 0 obj << /Parent 1 0 R /Rotate 0 /Type /Page /Contents 162 0 R /Resources << /XObject << /R125 163 0 R >> /ExtGState << /R100 129 0 R /R124 164 0 R /R8 32 0 R /R82 120 0 R >> /Font << /R109 147 0 R /R118 165 0 R /R9 39 0 R /R70 85 0 R /R111 151 0 R /R107 155 0 R /F1 176 0 R /F2 177 0 R /R11 45 0 R /R66 77 0 R /R121 169 0 R /R17 56 0 R /R13 49 0 R /R126 178 0 R /R68 88 0 R >> /ProcSet [ /ImageC /Text /PDF /ImageI /ImageB ] >> /Group 118 0 R /MediaBox [ 0 0 612 792 ] /Annots [ ] >> endobj 8 0 obj << /Parent 1 0 R /Rotate 0 /Contents 181 0 R /Resources << /XObject << /R144 182 0 R /R147 183 0 R /R140 184 0 R /R150 185 0 R /R143 194 0 R /R149 192 0 R /R148 193 0 R /R138 190 0 R /R139 191 0 R >> /ExtGState << /R146 186 0 R /R8 32 0 R /R142 188 0 R /R100 129 0 R /R99 125 0 R /R82 120 0 R /R92 132 0 R /R87 117 0 R >> /Font << /R109 147 0 R /R9 39 0 R /R111 151 0 R /R107 155 0 R /F2 195 0 R /R11 45 0 R /F1 196 0 R /R17 56 0 R /R93 136 0 R /R96 140 0 R >> /ProcSet [ /ImageC /Text /PDF /ImageI /ImageB ] >> /Group 123 0 R /MediaBox [ 0 0 612 792 ] /Annots [ 197 0 R 198 0 R 199 0 R 200 0 R ] /Type /Page >> endobj 9 0 obj << /Parent 1 0 R /Rotate 0 /Contents 201 0 R /Resources << /XObject << /R163 202 0 R /R162 203 0 R /R160 204 0 R /R167 205 0 R /R166 206 0 R /R165 207 0 R /R164 208 0 R /R169 209 0 R /R168 210 0 R /R159 211 0 R >> /ExtGState << /R82 120 0 R /R8 32 0 R >> /Font << /R118 165 0 R /R9 39 0 R /F2 212 0 R /R11 45 0 R /F1 213 0 R /R17 56 0 R >> /ProcSet [ /ImageC /Text /PDF /ImageI /ImageB ] >> /Group 118 0 R /MediaBox [ 0 0 612 792 ] /Annots [ 214 0 R 215 0 R 216 0 R ] /Type /Page >> endobj 10 0 obj << /Parent 1 0 R /Rotate 0 /Type /Page /Contents 217 0 R /Resources << /ExtGState << /R8 32 0 R >> /Font << /R109 147 0 R /R11 45 0 R /R13 49 0 R /R9 39 0 R /F2 218 0 R /F1 219 0 R /R111 151 0 R /R17 56 0 R /R107 155 0 R >> /ProcSet [ /ImageC /Text /PDF /ImageI /ImageB ] >> /MediaBox [ 0 0 612 792 ] /Annots [ 220 0 R 221 0 R 222 0 R 223 0 R 224 0 R 225 0 R 226 0 R 227 0 R 228 0 R 229 0 R 230 0 R 231 0 R 232 0 R 233 0 R ] >> endobj 11 0 obj << /Parent 1 0 R /Rotate 0 /Type /Page /Contents 234 0 R /Resources << /ExtGState << /R8 32 0 R >> /Font << /F2 235 0 R /R11 45 0 R /F1 236 0 R /R17 56 0 R >> /ProcSet [ /ImageC /Text /PDF /ImageI /ImageB ] >> /MediaBox [ 0 0 612 792 ] /Annots [ 237 0 R 238 0 R 239 0 R 240 0 R 241 0 R 242 0 R 243 0 R 244 0 R 245 0 R 246 0 R 247 0 R 248 0 R 249 0 R 250 0 R 251 0 R 252 0 R 253 0 R 254 0 R 255 0 R 256 0 R 257 0 R ] >> endobj 12 0 obj << /Type /Catalog /Pages 1 0 R >> endobj 13 0 obj << /Length 16700 >> stream q q q 0.10000 0 0 0.10000 0 0 cm /R8 gs 0 g q 10 0 0 10 0 0 cm BT /R9 14.34620 Tf 1 0 0 1 56.46910 675.06700 Tm [ (CALIPER\072) -250.00900 (Continuous) -250.00700 (A) 50.00170 (uthentication) -249.99000 (Lay) 10.01160 (er) 17.99630 (ed) -250.00500 (with) -250.01300 (Integrated) -249.99800 (PKI) -250.00200 (Encoding) ] TJ 204.48200 -17.93320 Td (Recognition) Tj /R11 11.95520 Tf -53.89920 -37.85780 Td [ (Ethan) -250.01600 (M\056) -250.00800 (Rudd) -250 (and) -249.98700 (T) 70.01640 (errance) -249.99500 (E\056) -250.01600 (Boult) ] TJ -13.96910 -13.94730 Td [ (Uni) 24.99570 (v) 14.98510 (ersity) -249.98900 (of) -250.01400 (Colorado) -249.98900 (at) -249.98700 (Colorado) -249.98900 (Springs) ] TJ -3.29375 -13.94800 Td [ (V) 59.99060 (ision) -250.01200 (and) -249.98700 (Security) -250.00600 (T) 70.01640 (echnology) -249.99700 (\050V) 134.99700 (AST\051) -249.98900 (Lab) ] TJ /R13 11.95520 Tf 20.65780 -13.94770 Td (f) Tj /R11 11.95520 Tf 5.97813 0 Td (erudd\054tboult) Tj /R13 11.95520 Tf 58.11290 0 Td (g) Tj /R11 11.95520 Tf 5.97813 0 Td (\100) Tj ET Q 0 1 0 0 k q 10 0 0 10 0 0 cm BT /R15 11.95520 Tf 1 0 0 1 291.52700 577.43300 Tm (vast\056uccs\056edu) Tj ET Q 0 g q 10 0 0 10 0 0 cm BT /R9 11.95520 Tf 1 0 0 1 145.99500 536.38700 Tm (Abstract) Tj /R17 9.96260 Tf -83.92810 -25.12500 Td [ (Ar) 36.98400 (c) 15.01280 (hitectur) 37.00360 (es) -813 (r) 37.01960 (elying) -812.98600 (on) -812.99200 (continuous) -812.99400 (authentication) ] TJ -11.95470 -11.95510 Td [ (r) 37.01960 (equir) 36.99320 (e) -210.00800 (a) -210 (secur) 36.98280 (e) -210.98900 (way) -209.99100 (to) -209.99200 (c) 15.01220 (halleng) 9.98975 (e) -210.00900 (the) -209.99700 (user\047) 40.00310 (s) -211.01900 (identity) -210.01400 (without) ] TJ 11.95510 TL T* [ (trusting) -634.98200 (that) -635.98700 (the) -634.98500 (Continuous) -635.00700 (A) 20 (uthentication) -635.99400 (Subsystem) ] TJ T* [ (\050CAS\051) -411.01400 (has) -411.01400 (not) -411.01200 (been) -410.98900 (compr) 44.98760 (omised\054) -450.99800 (i\056e) 14.98280 (\056\054) -451.99800 (that) -411.00500 (the) -410.98300 (r) 37.01830 (esponse) ] TJ T* [ (to) -578.98900 (the) -578.99300 (layer) -578.99200 (whic) 14.99870 (h) -578.99700 (mana) 10.01670 (g) 10.00320 (es) -579 (service\057application) -579.01600 (access) ] TJ T* [ (is) -489.98300 (not) -489 (fak) 10.00630 (e) 15.01280 (\056) -1029.98000 (In) -489.01500 (this) -490.01000 (paper) 111.01800 (\054) -549.98400 (we) -489.00800 (intr) 44.99860 (oduce) -489.98900 (the) -489.98900 (CALIPER) ] TJ 11.95590 TL T* [ (pr) 44.98390 (otocol\054) -510.98500 (in) -457.99000 (whic) 14.99870 (h) -459.01700 (a) -457.99700 (separ) 14.99630 (ate) -459.01400 (Continuous) -458.01700 (Access) -459.01900 (V) 111.00600 <657269022d> ] TJ 11.95510 TL T* [ (cation) -401.98600 (Entity) -401.98600 (\050CA) 105.01600 (VE\051) -400.98700 (dir) 36.99260 (ectly) -402.01000 (c) 15.01220 (halleng) 9.98853 (es) -402.00900 (the) -402.00400 (user\047) 40.00310 (s) -402.00600 (iden\055) ] TJ T* [ (tity) -530.01200 (in) -530.99700 (a) -529.98500 (continuous) -531.00200 (authentication) -530.00600 (r) 37.01830 (e) 39.98840 (gime) 14.98770 (\056) -1150.98000 (Instead) -530.99000 (of) ] TJ T* [ (simply) -270.00900 (r) 37.01960 (eturning) -271.01700 (authentication) -270.01000 (pr) 44.98390 (obabilities) -270.01400 (or) -271.00100 <636f6e0264656e6365> ] TJ T* [ (scor) 36.98710 (es\054) -354.01500 (CALIPER\047) 39.99090 (s) -334.01700 (CAS) -334 (uses) -332.99100 (live) -334.01700 (har) 36.99020 (d) -332.99800 (and) -334.00800 (soft) -333.99800 (biometric) ] TJ T* [ (samples) -401.00400 (fr) 44.98640 (om) -400.98500 (the) -402.00400 (user) -401.01900 (to) -401.01900 (e) 19.99180 (xtr) 14.98650 (act) -400.98500 (a) -402.00600 (crypt) 0.99003 (o) 10.00320 (gr) 14.99010 (aph) -1.00473 (i) 0.98758 (c) -402.01600 (private) ] TJ 11.95630 TL T* [ (k) 9.99404 (e) 29.99070 (y) -509.01700 (embedded) -509.00300 (in) -509.98100 (a) -509.00800 (c) 15.01220 (halleng) 9.98975 (e) -509.01800 (posed) -508.99600 (by) -509.01300 (the) -509.00600 (CA) 105.01900 (VE\056) -509.98400 (The) ] TJ 11.95470 TL T* [ (CAS) -421.98600 (then) -423.01500 (uses) -421.99600 (this) -423.00200 (k) 9.99343 (e) 29.99010 (y) -422.01300 (to) -421.99600 (sign) -423.00400 (a) -422.00300 (r) 37.01960 (esponse) -423.00800 (to) -421.99600 (the) -423.02000 (CA) 105.01900 (VE\056) ] TJ T* [ (CALIPER) -426.00700 (supports) -424.98200 (multiple) -426.01000 (modalities\054) -469.98800 (k) 9.99343 (e) 29.99010 (y) -426.01200 (lengths\054) -470.00500 (and) ] TJ T* [ (security) -352.98200 (le) 14.98100 (vels) -352.99500 (and) -354.00500 (can) -352.99400 (be) -352.99900 (applied) -353.98900 (in) -352.98800 (two) -353.01500 (scenarios\072) -516.98200 (One) ] TJ T* [ (wher) 36.99440 (e) -196.99100 (the) -195.99900 (CAS) -197.00400 (must) -197.00500 (authenticate) -196.00500 (its) -197.00500 (user) -197.01400 (to) -195.99400 (a) -196.98200 (CA) 105.01900 (VE) -197.01900 (running) ] TJ 11.95590 TL T* [ (on) -455.01200 (a) -455.99700 (r) 37.01960 (emote) -455.01600 (server) -455.01700 (\050de) 15.01470 (vice\055server\051) -456.01000 (for) -455.00500 (access) -455.01700 (to) -455.99000 (r) 37.01830 (emote) ] TJ 11.95510 TL T* [ (application) -199.99100 (data\054) -210.01900 (and) -201.01100 (another) -200.01600 (wher) 36.99380 (e) -200.01100 (the) -199.99800 (CAS) -199.98400 (must) -201.00300 (authenti\055) ] TJ T* [ (cate) -251.99300 (its) -252.01600 (user) -253.00400 (to) -251.98500 (a) -251.99200 (locally) -252.01300 (running) -251.99800 (trusted) -252.00500 (computing) -253.01900 (module) ] TJ T* [ (\050TCM\051) -322.98200 (for) -322.00600 (access) -323.00100 (to) -322.99300 (local) -322.00500 (application) -322.99000 (data) -322.98300 (\050de) 15.01470 (vice\055TCM\051\056) ] TJ T* [ (W) 91.98650 (e) -269.99800 (further) -270 (demonstr) 15.01100 (ate) -269.98700 (that) -270.00900 (CALIPER) -269.99400 (can) -269.98900 (le) 14.98030 (ver) 15.01470 (a) 10.00320 (g) 10.00320 (e) -270 (de) 15.01710 (vice) ] TJ T* [ (har) 36.99020 (dwar) 37.00360 (e) -450.98800 (r) 37.01960 (esour) 36.99260 (ces) -450.98600 (to) -451.99100 (enable) -451.00900 (privacy) -451.01300 (and) -451.00800 (security) -451.98300 (e) 15.01220 (ven) ] TJ 11.95590 TL T* [ (when) -229.98200 (the) -231.01200 (de) 15.01770 (vice\047) 39.98470 (s) -229.99500 (k) 9.99343 (ernel) -229.99100 (is) -231.00700 (compr) 44.98760 (omis) 1.00106 (ed\054) -235.01700 (and) -229.98600 (we) -229.99100 (show) -230.99100 (how) ] TJ 11.95510 TL T* [ (this) -230.99500 (authentication) -232.01600 (pr) 44.98390 (otocol) -230.99600 (can) -231.99400 (e) 15.01220 (ven) -230.98500 (be) -232 (e) 19.99180 (xpanded) -231.00300 (to) -231.98800 (obfus\055) ] TJ T* [ (cate) -303.98500 (dir) 36.99260 (ect) -303.99000 (k) 9.99404 (ernel) -302.99800 (object) -304.01200 (manipulation) -304 (\050DK) 50.00390 (OM\051) -303.98600 (malwar) 37.01340 (es\056) ] TJ /R9 11.95520 Tf 51.46410 TL T* [ (1\056) -249.99000 (Intr) 18.01460 (oduction) ] TJ /R11 9.96260 Tf 11.95470 -20.14300 Td [ (T) 79.99030 (w) 10.00140 (o) -204.98000 (fundamental) -206.01300 (problems) -204.99200 (e) 15.01220 (xist) -204.99900 (with) -205.00300 (con) 39.99820 (v) 14.98280 (entional) -206.01700 (pass\055) ] TJ -11.95470 -11.95590 Td [ (w) 10.00140 (ord\054) -435.01600 (tok) 10.01550 (en\054) -436.00300 (and) -398.00600 (biometric) -398.01900 (authentication) -398.98700 (schemes\056) -754.99200 (The) ] TJ 11.95510 TL T* [ <02727374> -236.01500 (problem) -236.01200 (is) -237.00600 (one) -235.99400 (of) ] TJ /R17 9.96260 Tf 89.80390 0 Td [ (infr) 37 (equent) -235.98600 (authentication) ] TJ /R11 9.96260 Tf 100.50500 0 Td [ (\056) -305.00500 (Assuming) ] TJ -190.30900 -11.95510 Td [ (that) -354.98400 (a) -353.98400 (le) 14.98100 (gitimate) -355.00200 (user) -354.01600 (performed) -354.99100 (the) -354.01200 (initial) -355.00200 (authentication\054) ] TJ T* [ (there) -372.99700 (is) -372.00300 (no) -372.98700 (v) 24.98110 (alidation) -371.98100 (mechanism) -373.00100 (to) -372.00400 (ensure) -372.99200 (that) -372.00200 (the) -372.98900 (same) ] TJ T* [ (user) -208.98100 (that) -209.00900 (logged) -207.98100 (in) -209.01200 (is) -209.01000 (the) -209.01700 (same) -209.01400 (user) -208 (using) -208.99500 (the) -209.01700 (de) 25.01540 (vice) -208.98200 (minutes) ] TJ 258.75000 455.38700 Td [ (or) -267.99200 (hours) -266.99700 (later) 55.01290 (\056) -362.99600 (Such) -266.99500 (authentication) -267.99000 (schemes) -267 (guarantee) -267.99500 (only) ] TJ T* [ (that) -383.01900 (the) -382.98800 (current) -384.01200 (user) -382.99200 (of) -382.99200 (the) -382.98500 (de) 25.01540 (vice) -382.99000 (possessed) -383.98500 (a) -383 (passw) 10.01300 (ord\054) ] TJ T* [ (biometric\054) -262.98100 (or) -261.01300 (security) -260.99600 (tok) 10.01790 (en) -259.99600 (at) -261.01000 (the) -261.00500 (time) -260.01100 (of) -261.01500 (login\056) -341.98700 (This) -260.99100 (guar) 19.99670 (\055) ] TJ 11.95630 TL T* [ (antee) -273.99300 (does) -273.98100 (nothing) -273.99300 (to) -273.98100 (a) 1.01454 (d) -1.01454 (dr) 0.98023 (ess) -273.98400 (post\055login) -273.98400 (risk\072) -357.99400 (If) -273.99800 (Bob) -274.00800 (steals) ] TJ 11.95470 TL T* [ (Alice\047) 55.01530 (s) -416.00400 (phone) -415.99400 (while) -415.99200 (Alice) -416 (is) -415.99400 (still) -416.01400 (logged) -415.98400 (on) -416 (to) -416 (her) -416.01400 (bank) ] TJ T* [ (account\054) -277 (Bob) -272.01100 (can) -271.01600 (do) -271.98400 (catastrophic) -270.99400 (harm) -271.98400 (to) -271.98400 (Alice\054) -277.00300 (re) 15.00730 (g) 4.98446 (ardless) ] TJ T* [ (of) -382.01200 (ho) 24.98600 (w) -382.99200 (man) 14.99010 (y) -382.01000 (questions) -382.01200 (the) -382.00500 (bank) -382.98500 (ask) 10.00320 (ed) -382.01500 (or) -382.01500 (the) -382.00500 (number) -383.01500 (of) ] TJ T* [ (f) 9.99588 (actors) -249.99000 (of) -249.99500 (authentication) -249.99300 (used) -249.98800 (during) -250.01200 (the) -249.98800 (initial) -250.00200 (login\056) ] TJ 11.95510 -12.31870 Td [ (The) -440.98000 (second) -441.01200 (problem) -440.99700 (is) -441.01000 (one) -441.02000 (of) ] TJ /R17 9.96260 Tf 132.05300 0 Td [ (r) 37.01830 (emote) -441.02000 (trust) ] TJ /R11 9.96260 Tf 49.96210 0 Td [ (\056) -882.98500 (Remote) ] TJ -193.97000 -11.95510 Td [ (services) -209.01700 (must) -208.99500 (trust) -209.00200 (the) -209.01700 (authentication) -209.01900 (subsystem\072) -290.01500 (The) 14.98280 (y) -209.01900 (ha) 19.99670 (v) 14.98280 (e) ] TJ T* [ (no) -332.01300 (independent) -331.01100 (w) 10 (ay) -331.98400 (to) -332.01100 (challenge) -330.99400 (a) -331.98900 (user\047) 55.01040 (s) -332.01800 (identity) 65.00880 (\056) -555 (If) -331.98900 (Bob) ] TJ 11.95590 TL T* [ (steals) -387.01600 (Alice\047) 55.01530 (s) -386.98900 (authentication) -386.98900 (credentials\054) -421.00800 (Bob) -387.00900 (will) -387.00900 (still) -387 (be) ] TJ 11.95510 TL T* [ (authenticated) -488.00900 (by) -489.00700 (Alice\047) 55.01530 (s) -487.99200 (bank\054) -548.99200 (since) -487.98700 (the) -489.00700 (bank) -487.98700 (can) -488.98200 (only) ] TJ T* [ (establish) -196.01100 (the) -195.01900 (v) 14.98280 (eracity) -196.00400 (or) -196.00400 (lack) -196.00200 (thereof) -194.98700 (of) -196.00700 (the) -195.99700 (login) -196.01600 (credentials\056) ] TJ T* [ (Bob) -393.99100 (can) -394.01500 (continue) -393.00800 (to) -394 (login) -393.98300 (until) -393.98300 (Alice) -392.98300 (or) -394.01300 (the) -394.00300 (bank) -394.00300 (notice) ] TJ T* [ (and\057or) -259 (change) -259.01300 (Alice\047) 55.01530 (s) -259.99100 (passw) 10.01300 (ord\056) -336.99300 (Note) -259.00600 (that) -259.98100 (de) 25.01540 (vice) -259.01100 (authenti\055) ] TJ T* [ (cation) -314.99200 (methods) -315.00900 (by) -314.99600 (themselv) 15.01220 (es\054) -330.99900 (in) -316.01600 (which) -314.99200 (the) -314.99600 (user) -315.00100 (authenti\055) ] TJ 11.95590 TL T* [ (cates) -265.99500 (to) -265.98300 (the) -265.98700 (de) 25.01540 (vice) -265.01200 (and) -265.99000 (the) -265.98500 (de) 25.01540 (vice) -265.99000 (authenticates) -266.00500 (to) -265.98500 (a) -266 (remote) ] TJ 11.95510 TL T* [ (entity) -417.98200 (still) -418.01400 (do) -419.01800 (not) -417.99200 (solv) 15 (e) -418.01400 (the) -417.99900 (remote) -419.01300 (trust) -417.98400 (problem\056) -815.01100 (Ev) 14.98770 (en) ] TJ T* [ (under) -368.01000 (the) -368.01000 (idealized) -368.00200 <026374696f6e616c> -368.01700 (assumption) -368.00200 (of) -368.99700 (perfect) -367.98300 (de) 25.01540 (vice) ] TJ T* [ (authentication\054) -392.00600 (i\056e\056\054) -390.98400 (the) -362.99100 (remote) -364.00300 (entity) -363.00800 (only) -363.01300 (kno) 24.99090 (ws) -362.98800 (that) ] TJ /R17 9.96260 Tf 224.07600 0 Td (the) Tj -224.07600 -11.95510 Td [ (actual) -349.01500 (de) 15.01710 (vice\047) 39.98350 (s) ] TJ /R11 9.96260 Tf 63.94100 0 Td [ (user) -348.99800 (aut) 0.98758 (hentication) -349.00500 (module) -349.01000 (\223said\224) -348.01500 (that) -348.98600 (the) ] TJ -63.94100 -11.95470 Td [ (user) -283.00900 (w) 10 (as) -283.00900 (v) 24.98110 (alid\056) -409.99300 (It) -283.00700 (has) -283.00400 (no) -283.00200 (independent) -283.02100 (w) 10.00320 (ay) -283.01200 (to) -284.02100 (challenge) -283.00200 (the) ] TJ 11.95630 TL T* [ (user) 55.01290 (\056) -753.98900 (If) -398.01900 (Bob) -397.99000 (has) -398.00500 (stolen) -397.98500 (Alice\047) 55.01530 (s) -398.00700 (de) 25.01540 (vice) -398.00700 (and) -398.00700 (passw) 10.01300 (ord\054) -435.01600 (he) ] TJ 11.95470 TL T* [ (poses) -201.98800 (a) -200.99100 (security) -201.98600 (risk\054) -211.00600 (e) 25.01050 (v) 14.98280 (en) -202.00600 (under) -201.99600 (this) -201 (nai) 24.98600 (v) 14.98280 (e) -202.01000 <026374696f6e616c> -202.00600 (assump\055) ] TJ T* [ (tion) -250.01200 (of) -249.99500 (perfect) -250.00500 (de) 25.01540 (vice) -249.99500 (authentication\056) ] TJ 11.95510 -12.31910 Td [ (These) -338.01500 (tw) 10.00810 (o) -338.99700 (shortcomings) -338.00700 (in) -338.01200 (con) 39.99820 (v) 14.98280 (entional) -339.01200 (authentication) ] TJ -11.95510 -11.95510 Td [ (schemes) -229.00300 (can) -228.98400 (allo) 24.99090 (w) -229.01800 (an) -228.98100 (adv) 14.98280 (ersary) -228.98600 (to) -229.01100 (g) 4.98446 (ain) -229.99100 (acce) 1 (ss) -229.99100 (to) -229.01100 (the) -229.01100 (de) 25.01540 (vice) ] TJ T* [ (post\055login\054) -221.99000 (which) -215.98800 (at) -214.98100 (the) -215.99600 (v) 14.98280 (ery) -214.98900 (least) -215.99300 (compromises) -215.01300 (the) -215.99300 (session\056) ] TJ T* [ (Further) 40.01290 (\054) -241.01600 (the) 14.98520 (y) -239.99400 (may) -239.00700 (allo) 24.99090 (w) -239.99700 (an) -239.01900 (adv) 14.98280 (ersary) -238.98500 (to) -239.98900 (steal) -239.00900 (or) -239.01900 (spoof) -239.98000 (login) ] TJ T* [ (credentials) -233.98300 (for) -234.00300 (later) -233.01700 (use) -233.99300 (at) -233.99500 (the) -233.99000 (adv) 14.98280 (ersary\047) 55.00550 (s) -233.99500 (discretion\054) -236.98500 (poten\055) ] TJ 11.95590 TL T* [ (tially) -510.00300 (compromising) -510.99100 <636f6e0264656e7469616c697479> 64.99410 (\054) -574.99700 (inte) 14.99260 (grity) 64.98920 (\054) -574.99700 (and) -511.00800 (a) 19.99180 (v) 24.98110 (ail\055) ] TJ 11.95510 TL T* [ (ability) -266 (of) -265.99200 (all) -265.00500 (data) -265.99200 (to) -265.98300 (which) -266.01900 (the) -265.98500 (le) 14.98280 (gitimate) -265.01500 (user) -265.99000 (of) -265.99500 (the) -265.98500 (de) 25.01540 (vice) ] TJ T* [ (has) -249.99000 (access\056) ] TJ 11.95510 -12.31910 Td [ (Recent) -669.01300 (adv) 24.98110 (ances) -668.98900 (in) -669.01300 (continuous) -670 (authentication) -668.98200 (of) 25.01540 (fer) ] TJ -11.95510 -11.95510 Td [ (promising) -854.00500 (solutions) -854 (to) -854.00500 (the) -854.00500 (infrequent) -853.99500 (authentication) ] TJ T* [ (problem\056) -698.99100 (In) -380.01300 (continuous) -380.00800 (authentication\054) -412.00500 (a) -380.02000 (de) 25.01540 (vice) -380.01000 (continu\055) ] TJ T* [ (ously) -357.00900 (obtains) -357.98700 (hard) -356.99700 (and) -358.01400 (soft) -356.98500 (biometrics) -357 (in) -358.00900 (a) -357.00400 (manner) -358.00900 (trans\055) ] TJ T* [ (parent) -465.99600 (to) -467.00800 (the) -465.99300 (user) -465.99800 (so) -465.98800 (that) -467.00500 (local) -465.99100 (or) -466 (remote) -465.98600 (services) -467.01000 (may) ] TJ ET Q Q Q q q 1 1 1 rg /a0 gs 48.40600 786.42200 515.18800 -52.69900 re f q /s5 gs /x6 Do Q q /s7 gs /x8 Do Q q /s9 gs /x10 Do Q q /s11 gs /x12 Do Q Q Q Q q 1 0 0 1 0 0 cm BT /F1 12 Tf 14.40000 TL ET 1 1 1 rg n 270 32 72 14 re f* 0.50000 0.50000 0.50000 rg BT /F2 9 Tf 10.80000 TL ET BT 1 0 0 1 299.25000 35 Tm (127) Tj T* ET Q endstream endobj 14 0 obj << /Filter /FlateDecode /Resources << /ExtGState << /a0 << /CA 1 /ca 1 >> >> /XObject << /x18 15 0 R >> >> /Length 28 /Group << /Type /Group /S /Transparency /CS /DeviceRGB /I true >> /BBox [ 78 746 96 765 ] /Type /XObject /Subtype /Form >> stream x+O4PH/VЯ0Pp 0 endstream endobj 15 0 obj << /Filter /FlateDecode /Resources 16 0 R /Length 107 /Type /XObject /BBox [ 78 746 96 765 ] /Subtype /Form >> stream xe AC̬wʠ =p,?]%+H-
Jc "82w8VSnGW;"
endstream
endobj
16 0 obj
<<
/ExtGState <<
/a0 <<
/CA 1
/ca 1
>>
>>
>>
endobj
17 0 obj
<<
/Filter /FlateDecode
/Resources <<
/ExtGState <<
/a0 <<
/CA 1
/ca 1
>>
>>
/XObject <<
/x15 18 0 R
>>
>>
/Length 28
/Group <<
/Type /Group
/S /Transparency
/CS /DeviceRGB
/I true
>>
/BBox [ 67 752 84 775 ]
/Type /XObject
/Subtype /Form
>>
stream
x+O4PH/VЯ04Up
0
endstream
endobj
18 0 obj
<<
/Filter /FlateDecode
/Resources 19 0 R
/Length 228
/Type /XObject
/BBox [ 67 752 84 775 ]
/Subtype /Form
>>
stream
xeQKn!s ?FPav6R٪TS.
b];15YyR
{7QL.\:Rv/x9l+L7h%1!}i/AI(kz"U&,YO![R hg{3}4/GyYF:!w}Gn+'xJcO9i뽼_-:`
endstream
endobj
19 0 obj
<<
/ExtGState <<
/a0 <<
/CA 1
/ca 1
>>
>>
>>
endobj
20 0 obj
<<
/Filter /FlateDecode
/Resources <<
/ExtGState <<
/a0 <<
/CA 1
/ca 1
>>
>>
/XObject <<
/x24 21 0 R
>>
>>
/Length 28
/Group <<
/Type /Group
/S /Transparency
/CS /DeviceRGB
/I true
>>
/BBox [ 112 751 500 772 ]
/Type /XObject
/Subtype /Form
>>
stream
x+O4PH/VЯ02Qp
0
endstream
endobj
21 0 obj
<<
/Filter /FlateDecode
/Resources 22 0 R
/Length 56490
/Type /XObject
/BBox [ 112 751 500 772 ]
/Subtype /Form
>>
stream
xtIJ5*|^~x?P9)<<ҥ+kh4}/?>]漿վ]Z Ǭ57W'b~?Kwk6:>rAニxeG1k-/LfߗA̺(egk5>
=KO1{Vux}Ol|_s؟|*>5=k|*a5x}On :97~1s7rX {|>IQQo6|'\#x_ڽC}M7(췀(N
سW#^Ň}|zblnB'\o=r;$s:z-
V3+έ昵 WD/nl ;q"3Pg휅\3C`k7760c9-Cȸ