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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     <h3>Entries from April 2016.</h3>
  23
  24     <div class="entry">
  25       <div class="title">
  26         <a href="http://people.skolelinux.org/pere/blog/syslog_trusted_timestamp___chain_of_trusted_timestamps_for_your_syslog.html">syslog-trusted-timestamp - chain of trusted timestamps for your syslog</a>
  27       </div>
  28       <div class="date">
  29          2nd April 2016
  30       </div>
  31       <div class="body">
  32         <p>Two years ago, I had
  33 <a href="http://people.skolelinux.org/pere/blog/Public_Trusted_Timestamping_services_for_everyone.html">a
  34 look at trusted timestamping options available</a>, and among
  35 other things noted a still open
  36 <a href="https://bugs.debian.org/742553">bug in the tsget script</a>
  37 included in openssl that made it harder than necessary to use openssl
  38 as a trusted timestamping client.  A few days ago I was told
  39 <a href="https::/www.difi.no/">the Norwegian government office DIFI</a> is
  40 close to releasing their own trusted timestamp service, and in the
  41 process I was happy to learn about a replacement for the tsget script
  42 using only curl:</p>
  43
  44 <p><pre>
  45 openssl ts -query -data "/etc/shells" -cert -sha256 -no_nonce \
  46   | curl -s -H "Content-Type: application/timestamp-query" \
  47          --data-binary "@-" http://zeitstempel.dfn.de > etc-shells.tsr
  48 openssl ts -reply -text -in etc-shells.tsr
  49 </pre></p>
  50
  51 <p>This produces a binary timestamp file (etc-shells.tsr) which can be
  52 used to verify that the content of the file /etc/shell with the
  53 calculated sha256 hash existed at the point in time when the request
  54 was made.  The last command extract the content of the etc-shells.tsr
  55 in human readable form.  The idea behind such timestamp is to be able
  56 to prove using cryptography that the content of a file have not
  57 changed since the file was stamped.</p>
  58
  59 <p>To verify that the file on disk match the public key signature in
  60 the timestamp file, run the following commands.  It make sure you have
  61 the required certificate for the trusted timestamp service available
  62 and use it to compare the file content with the timestamp.  In
  63 production, one should of course use a better method to verify the
  64 service certificate.</p>
  65
  66 <p><pre>
  67 wget -O ca-cert.txt https://pki.pca.dfn.de/global-services-ca/pub/cacert/chain.txt
  68 openssl ts -verify -data /etc/shells -in etc-shells.tsr -CAfile ca-cert.txt -text
  69 </pre></p>
  70
  71 <p>Wikipedia have a lot more information about
  72 <a href="https://en.wikipedia.org/wiki/Trusted_timestamping">trusted
  73 Timestamping</a> and
  74 <a href="https://en.wikipedia.org/wiki/Linked_timestamping">linked
  75 timestamping</a>, and there are several trusted timestamping services
  76 around, both as commercial services and as free and public services.
  77 Among the latter is
  78 <a href="https://www.pki.dfn.de/zeitstempeldienst/">the
  79 zeitstempel.dfn.de service</a> mentioned above and
  80 <a href="https://freetsa.org/">freetsa.org service</a> linked to from the
  81 wikipedia web site.  I believe the DIFI service should show up on
  82 https://tsa.difi.no, but it is not available to the public at the
  83 moment.  I hope this will change when it is into production.  The
  84 <a href="https://tools.ietf.org/html/rfc3161">RFC 3161</a> trusted
  85 timestamping protocol standard is even implemented in LibreOffice,
  86 Microsoft Office and Adobe Acrobat, making it possible to verify when
  87 a document was created.</p>
  88
  89 <p>I would find it useful to be able to use such trusted timestamp
  90 service to make it possible to verify that my stored syslog files have
  91 not been tampered with.  This is not a new idea.  I found one example
  92 implemented on the Endian network appliances where
  93 <a href="http://help.endian.com/entries/21518508-Enabling-Timestamping-on-log-files-">the
  94 configuration of such feature was described in 2012</a>.</p>
  95
  96 <p>But I could not find any free implementation of such feature when I
  97 searched, so I decided to try to
  98 <a href="https://github.com/petterreinholdtsen/syslog-trusted-timestamp">build
  99 a prototype named syslog-trusted-timestamp</a>.  My idea is to
 100 generate a timestamp of the old log files after they are rotated, and
 101 store the timestamp in the new log file just after rotation.  This
 102 will form a chain that would make it possible to see if any old log
 103 files are tampered with.  But syslog is bad at handling kilobytes of
 104 binary data, so I decided to base64 encode the timestamp and add an ID
 105 and line sequence numbers to the base64 data to make it possible to
 106 reassemble the timestamp file again.  To use it, simply run it like
 107 this:
 108
 109 <p><pre>
 110 syslog-trusted-timestamp /path/to/list-of-log-files
 111 </pre></p>
 112
 113 <p>This will send a timestamp from one or more timestamp services (not
 114 yet decided nor implemented) for each listed file to the syslog using
 115 logger(1).  To verify the timestamp, the same program is used with the
 116 --verify option:</p>
 117
 118 <p><pre>
 119 syslog-trusted-timestamp --verify /path/to/log-file /path/to/log-with-timestamp
 120 </pre></p>
 121
 122 <p>The verification step is not yet well designed.  The current
 123 implementation depend on the file path being unique and unchanging,
 124 and this is not a solid assumption.  It also uses process number as
 125 timestamp ID, and this is bound to create ID collisions.  I hope to
 126 have time to come up with a better way to handle timestamp IDs and
 127 verification later.</p>
 128
 129 <p>Please check out
 130 <a href="https://github.com/petterreinholdtsen/syslog-trusted-timestamp">the
 131 prototype for syslog-trusted-timestamp on github</a> and send
 132 suggestions and improvement, or let me know if there already exist a
 133 similar system for timestamping logs already to allow me to join
 134 forces with others with the same interest.</p>
 135
 136 <p>As usual, if you use Bitcoin and want to show your support of my
 137 activities, please send Bitcoin donations to my address
 138 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 139
 140       </div>
 141       <div class="tags">
 142
 143
 144         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet</a>.
 145
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 152     <div id="sidebar">
 153
 154
 155
 156 <h2>Archive</h2>
 157 <ul>
 158
 159 <li>2016
 160 <ul>
 161
 162 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 163
 164 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 165
 166 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 167
 168 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (1)</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 (13)</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 (9)</a></li>
 400
 401  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (15)</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 (122)</a></li>
 408
 409  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (154)</a></li>
 410
 411  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
 412
 413  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (15)</a></li>
 414
 415  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (20)</a></li>
 416
 417  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 418
 419  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (306)</a></li>
 420
 421  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
 422
 423  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
 424
 425  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (25)</a></li>
 426
 427  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
 428
 429  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (16)</a></li>
 430
 431  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
 432
 433  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
 434
 435  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (11)</a></li>
 436
 437  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (19)</a></li>
 438
 439  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
 440
 441  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
 442
 443  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
 444
 445  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 446
 447  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
 448
 449  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (37)</a></li>
 450
 451  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (7)</a></li>
 452
 453  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (273)</a></li>
 454
 455  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (177)</a></li>
 456
 457  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (22)</a></li>
 458
 459  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 460
 461  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (58)</a></li>
 462
 463  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (92)</a></li>
 464
 465  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
 466
 467  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
 468
 469  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 470
 471  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
 472
 473  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (9)</a></li>
 474
 475  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 476
 477  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (4)</a></li>
 478
 479  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 480
 481  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (46)</a></li>
 482
 483  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 484
 485  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (4)</a></li>
 486
 487  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (49)</a></li>
 488
 489  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (3)</a></li>
 490
 491  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (10)</a></li>
 492
 493  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (36)</a></li>
 494
 495  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (2)</a></li>
 496
 497  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
 498
 499  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (8)</a></li>
 500
 501  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (55)</a></li>
 502
 503  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 504
 505  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (38)</a></li>
 506
 507 </ul>
 508
 509
 510     </div>
 511     <p style="text-align: right">
 512  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 513 </p>
 514
 515   </body>
 516 </html>