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 (5)</a></li>
  99
 100 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/03/">March (5)</a></li>
 101
 102 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/04/">April (3)</a></li>
 103
 104 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/06/">June (2)</a></li>
 105
 106 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/07/">July (5)</a></li>
 107
 108 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/08/">August (3)</a></li>
 109
 110 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/09/">September (3)</a></li>
 111
 112 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/10/">October (4)</a></li>
 113
 114 </ul></li>
 115
 116 <li>2017
 117 <ul>
 118
 119 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 120
 121 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 122
 123 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 124
 125 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 126
 127 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 128
 129 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 130
 131 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 132
 133 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 134
 135 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 136
 137 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 138
 139 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 140
 141 </ul></li>
 142
 143 <li>2016
 144 <ul>
 145
 146 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 147
 148 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 149
 150 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 151
 152 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 153
 154 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 155
 156 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 157
 158 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 159
 160 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 161
 162 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 163
 164 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 165
 166 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 167
 168 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 169
 170 </ul></li>
 171
 172 <li>2015
 173 <ul>
 174
 175 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 176
 177 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 178
 179 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 180
 181 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 182
 183 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 184
 185 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 186
 187 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 188
 189 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 190
 191 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 192
 193 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 194
 195 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 196
 197 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 198
 199 </ul></li>
 200
 201 <li>2014
 202 <ul>
 203
 204 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 205
 206 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 207
 208 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 209
 210 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 211
 212 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 213
 214 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 215
 216 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 217
 218 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 219
 220 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 221
 222 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 223
 224 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 225
 226 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 227
 228 </ul></li>
 229
 230 <li>2013
 231 <ul>
 232
 233 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 234
 235 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 236
 237 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 238
 239 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 240
 241 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 242
 243 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 244
 245 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 246
 247 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 248
 249 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 250
 251 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 252
 253 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 254
 255 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 256
 257 </ul></li>
 258
 259 <li>2012
 260 <ul>
 261
 262 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 263
 264 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 265
 266 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 267
 268 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 269
 270 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 271
 272 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 273
 274 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 275
 276 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 277
 278 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 279
 280 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 281
 282 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 283
 284 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 285
 286 </ul></li>
 287
 288 <li>2011
 289 <ul>
 290
 291 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 292
 293 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 294
 295 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 296
 297 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 298
 299 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 300
 301 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 302
 303 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 304
 305 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 306
 307 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 308
 309 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 310
 311 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 312
 313 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 314
 315 </ul></li>
 316
 317 <li>2010
 318 <ul>
 319
 320 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 321
 322 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 323
 324 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 325
 326 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 327
 328 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 329
 330 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 331
 332 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 333
 334 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 335
 336 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 337
 338 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 339
 340 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 341
 342 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 343
 344 </ul></li>
 345
 346 <li>2009
 347 <ul>
 348
 349 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 350
 351 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 352
 353 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 354
 355 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 356
 357 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 358
 359 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 360
 361 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 362
 363 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 364
 365 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 366
 367 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 368
 369 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 370
 371 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 372
 373 </ul></li>
 374
 375 <li>2008
 376 <ul>
 377
 378 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 379
 380 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 381
 382 </ul></li>
 383
 384 </ul>
 385
 386
 387
 388 <h2>Tags</h2>
 389 <ul>
 390
 391  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (16)</a></li>
 392
 393  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 394
 395  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 396
 397  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 398
 399  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (10)</a></li>
 400
 401  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (17)</a></li>
 402
 403  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 404
 405  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
 406
 407  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (163)</a></li>
 408
 409  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
 410
 411  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
 412
 413  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
 414
 415  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
 416
 417  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (25)</a></li>
 418
 419  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 420
 421  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (389)</a></li>
 422
 423  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
 424
 425  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (13)</a></li>
 426
 427  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (32)</a></li>
 428
 429  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
 430
 431  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
 432
 433  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
 434
 435  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
 436
 437  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (16)</a></li>
 438
 439  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (20)</a></li>
 440
 441  <li><a href="http://people.skolelinux.org/pere/blog/tags/kodi">kodi (3)</a></li>
 442
 443  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
 444
 445  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
 446
 447  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
 448
 449  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
 450
 451  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 452
 453  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
 454
 455  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (41)</a></li>
 456
 457  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (10)</a></li>
 458
 459  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (299)</a></li>
 460
 461  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (191)</a></li>
 462
 463  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (34)</a></li>
 464
 465  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 466
 467  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (72)</a></li>
 468
 469  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (107)</a></li>
 470
 471  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
 472
 473  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
 474
 475  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 476
 477  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
 478
 479  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
 480
 481  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 482
 483  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (6)</a></li>
 484
 485  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 486
 487  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (55)</a></li>
 488
 489  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 490
 491  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
 492
 493  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (56)</a></li>
 494
 495  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
 496
 497  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
 498
 499  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (55)</a></li>
 500
 501  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
 502
 503  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
 504
 505  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
 506
 507  <li><a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (13)</a></li>
 508
 509  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (69)</a></li>
 510
 511  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 512
 513  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (41)</a></li>
 514
 515 </ul>
 516
 517
 518     </div>
 519     <p style="text-align: right">
 520  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 521 </p>
 522
 523   </body>
 524 </html>