blog/Visualizing_GSM_radio_chatter_using_gr_gsm_and_Hopglass.html

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   6     <title>Petter Reinholdtsen: Visualizing GSM radio chatter using gr-gsm and Hopglass</title>
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  14  <h1>
  15      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  16
  17  </h1>
  18
  19 </div>
  20
  21
  22     <div class="entry">
  23       <div class="title">Visualizing GSM radio chatter using gr-gsm and Hopglass</div>
  24       <div class="date">29th September 2017</div>
  25       <div class="body"><p>Every mobile phone announce its existence over radio to the nearby
  26 mobile cell towers.  And this radio chatter is available for anyone
  27 with a radio receiver capable of receiving them.  Details about the
  28 mobile phones with very good accuracy is of course collected by the
  29 phone companies, but this is not the topic of this blog post.  The
  30 mobile phone radio chatter make it possible to figure out when a cell
  31 phone is nearby, as it include the SIM card ID (IMSI).  By paying
  32 attention over time, one can see when a phone arrive and when it leave
  33 an area.  I believe it would be nice to make this information more
  34 available to the general public, to make more people aware of how
  35 their phones are announcing their whereabouts to anyone that care to
  36 listen.</p>
  37
  38 <p>I am very happy to report that we managed to get something
  39 visualizing this information up and running for
  40 <a href="http://norwaymakers.org/osf17">Oslo Skaperfestival 2017</a>
  41 (Oslo Makers Festival) taking place today and tomorrow at Deichmanske
  42 library.  The solution is based on the
  43 <a href="http://people.skolelinux.org/pere/blog/Easier_recipe_to_observe_the_cell_phones_around_you.html">simple
  44 recipe for listening to GSM chatter</a> I posted a few days ago, and
  45 will show up at the stand of <a href="http://sonen.ifi.uio.no/">Åpen
  46 Sone from the Computer Science department of the University of
  47 Oslo</a>.  The presentation will show the nearby mobile phones (aka
  48 IMSIs) as dots in a web browser graph, with lines to the dot
  49 representing mobile base station it is talking to. It was working in
  50 the lab yesterday, and was moved into place this morning.</p>
  51
  52 <p>We set up a fairly powerful desktop machine using Debian
  53 Buster/Testing with several (five, I believe) RTL2838 DVB-T receivers
  54 connected and visualize the visible cell phone towers using an
  55 <a href="https://github.com/marlow925/hopglass">English version of
  56 Hopglass</a>.  A fairly powerfull machine is needed as the
  57 grgsm_livemon_headless processes from
  58 <a href="https://tracker.debian.org/pkg/gr-gsm">gr-gsm</a> converting
  59 the radio signal to data packages is quite CPU intensive.</p>
  60
  61 <p>The frequencies to listen to, are identified using a slightly
  62 patched scan-and-livemon (to set the --args values for each receiver),
  63 and the Hopglass data is generated using the
  64 <a href="https://github.com/petterreinholdtsen/IMSI-catcher/tree/meshviewer-output">patches
  65 in my meshviewer-output branch</a>.  For some reason we could not get
  66 more than four SDRs working.  There is also a geographical map trying
  67 to show the location of the base stations, but I believe their
  68 coordinates are hardcoded to some random location in Germany, I
  69 believe.  The code should be replaced with code to look up location in
  70 a text file, a sqlite database or one of the online databases
  71 mentioned in
  72 <a href="https://github.com/Oros42/IMSI-catcher/issues/14">the github
  73 issue for the topic</a>.
  74
  75 <p>If this sound interesting, visit the stand at the festival!</p>
  76 </div>
  77
  78       <div class="tags">Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern</a>, <a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance</a>.</div>
  79
  80
  81     </div>
  82
  83
  84
  85
  86     <div id="sidebar">
  87
  88
  89
  90 <h2>Archive</h2>
  91 <ul>
  92
  93 <li>2018
  94 <ul>
  95
  96 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/01/">January (1)</a></li>
  97
  98 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/02/">February (2)</a></li>
  99
 100 </ul></li>
 101
 102 <li>2017
 103 <ul>
 104
 105 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 106
 107 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 108
 109 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 110
 111 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 112
 113 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 114
 115 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 116
 117 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 118
 119 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 120
 121 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 122
 123 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 124
 125 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 126
 127 </ul></li>
 128
 129 <li>2016
 130 <ul>
 131
 132 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 133
 134 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 135
 136 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 137
 138 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 139
 140 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 141
 142 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 143
 144 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 145
 146 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 147
 148 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 149
 150 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 151
 152 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 153
 154 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 155
 156 </ul></li>
 157
 158 <li>2015
 159 <ul>
 160
 161 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 162
 163 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 164
 165 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 166
 167 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 168
 169 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 170
 171 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 172
 173 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 174
 175 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 176
 177 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 178
 179 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 180
 181 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 182
 183 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 184
 185 </ul></li>
 186
 187 <li>2014
 188 <ul>
 189
 190 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 191
 192 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 193
 194 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 195
 196 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 197
 198 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 199
 200 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 201
 202 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 203
 204 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 205
 206 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 207
 208 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 209
 210 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 211
 212 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 213
 214 </ul></li>
 215
 216 <li>2013
 217 <ul>
 218
 219 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 220
 221 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 222
 223 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 224
 225 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 226
 227 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 228
 229 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 230
 231 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 232
 233 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 234
 235 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 236
 237 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 238
 239 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 240
 241 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 242
 243 </ul></li>
 244
 245 <li>2012
 246 <ul>
 247
 248 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 249
 250 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 251
 252 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 253
 254 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 255
 256 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 257
 258 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 259
 260 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 261
 262 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 263
 264 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 265
 266 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 267
 268 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 269
 270 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 271
 272 </ul></li>
 273
 274 <li>2011
 275 <ul>
 276
 277 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 278
 279 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 280
 281 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 282
 283 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 284
 285 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 286
 287 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 288
 289 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 290
 291 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 292
 293 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 294
 295 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 296
 297 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 298
 299 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 300
 301 </ul></li>
 302
 303 <li>2010
 304 <ul>
 305
 306 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 307
 308 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 309
 310 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 311
 312 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 313
 314 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 315
 316 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 317
 318 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 319
 320 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 321
 322 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 323
 324 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 325
 326 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 327
 328 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 329
 330 </ul></li>
 331
 332 <li>2009
 333 <ul>
 334
 335 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 336
 337 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 338
 339 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 340
 341 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 342
 343 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 344
 345 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 346
 347 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 348
 349 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 350
 351 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 352
 353 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 354
 355 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 356
 357 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 358
 359 </ul></li>
 360
 361 <li>2008
 362 <ul>
 363
 364 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 365
 366 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 367
 368 </ul></li>
 369
 370 </ul>
 371
 372
 373
 374 <h2>Tags</h2>
 375 <ul>
 376
 377  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (15)</a></li>
 378
 379  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 380
 381  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 382
 383  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 384
 385  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (9)</a></li>
 386
 387  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (16)</a></li>
 388
 389  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 390
 391  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
 392
 393  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (155)</a></li>
 394
 395  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
 396
 397  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
 398
 399  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
 400
 401  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
 402
 403  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (24)</a></li>
 404
 405  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 406
 407  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (365)</a></li>
 408
 409  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
 410
 411  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (13)</a></li>
 412
 413  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (32)</a></li>
 414
 415  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
 416
 417  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
 418
 419  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
 420
 421  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
 422
 423  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (15)</a></li>
 424
 425  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (20)</a></li>
 426
 427  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
 428
 429  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
 430
 431  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
 432
 433  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
 434
 435  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 436
 437  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
 438
 439  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (39)</a></li>
 440
 441  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (9)</a></li>
 442
 443  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (295)</a></li>
 444
 445  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (190)</a></li>
 446
 447  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (33)</a></li>
 448
 449  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 450
 451  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (71)</a></li>
 452
 453  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (104)</a></li>
 454
 455  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
 456
 457  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
 458
 459  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 460
 461  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
 462
 463  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
 464
 465  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 466
 467  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (5)</a></li>
 468
 469  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 470
 471  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (53)</a></li>
 472
 473  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 474
 475  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
 476
 477  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (55)</a></li>
 478
 479  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
 480
 481  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
 482
 483  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (53)</a></li>
 484
 485  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
 486
 487  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
 488
 489  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
 490
 491  <li><a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (10)</a></li>
 492
 493  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (61)</a></li>
 494
 495  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 496
 497  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (40)</a></li>
 498
 499 </ul>
 500
 501
 502     </div>
 503     <p style="text-align: right">
 504  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 505 </p>
 506
 507   </body>
 508 </html>