blog/Public_Trusted_Timestamping_services_for_everyone.html

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   6     <title>Petter Reinholdtsen: Public Trusted Timestamping services for everyone</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">Public Trusted Timestamping services for everyone</div>
  24       <div class="date">25th March 2014</div>
  25       <div class="body"><p>Did you ever need to store logs or other files in a way that would
  26 allow it to be used as evidence in court, and needed a way to
  27 demonstrate without reasonable doubt that the file had not been
  28 changed since it was created?  Or, did you ever need to document that
  29 a given document was received at some point in time, like some
  30 archived document or the answer to an exam, and not changed after it
  31 was received?  The problem in these settings is to remove the need to
  32 trust yourself and your computers, while still being able to prove
  33 that a file is the same as it was at some given time in the past.</p>
  34
  35 <p>A solution to these problems is to have a trusted third party
  36 "stamp" the document and verify that at some given time the document
  37 looked a given way.  Such
  38 <a href="https://en.wikipedia.org/wiki/Notarius">notarius</a> service
  39 have been around for thousands of years, and its digital equivalent is
  40 called a
  41 <a href="http://en.wikipedia.org/wiki/Trusted_timestamping">trusted
  42 timestamping service</a>.  <a href="http://www.ietf.org/">The Internet
  43 Engineering Task Force</a> standardised how such service could work a
  44 few years ago as <a href="http://tools.ietf.org/html/rfc3161">RFC
  45 3161</a>.  The mechanism is simple.  Create a hash of the file in
  46 question, send it to a trusted third party which add a time stamp to
  47 the hash and sign the result with its private key, and send back the
  48 signed hash + timestamp.  Both email, FTP and HTTP can be used to
  49 request such signature, depending on what is provided by the service
  50 used. Anyone with the document and the signature can then verify that
  51 the document matches the signature by creating their own hash and
  52 checking the signature using the trusted third party public key.
  53 There are several commercial services around providing such
  54 timestamping.  A quick search for
  55 "<a href="https://duckduckgo.com/?q=rfc+3161+service">rfc 3161
  56 service</a>" pointed me to at least
  57 <a href="https://www.digistamp.com/technical/how-a-digital-time-stamp-works/">DigiStamp</a>,
  58 <a href="http://www.quovadisglobal.co.uk/CertificateServices/SigningServices/TimeStamp.aspx">Quo
  59 Vadis</a>,
  60 <a href="https://www.globalsign.com/timestamp-service/">Global Sign</a>
  61 and <a href="http://www.globaltrustfinder.com/TSADefault.aspx">Global
  62 Trust Finder</a>.  The system work as long as the private key of the
  63 trusted third party is not compromised.</p>
  64
  65 <p>But as far as I can tell, there are very few public trusted
  66 timestamp services available for everyone.  I've been looking for one
  67 for a while now. But yesterday I found one over at
  68 <a href="https://www.pki.dfn.de/zeitstempeldienst/">Deutches
  69 Forschungsnetz</a> mentioned in
  70 <a href="http://www.d-mueller.de/blog/dealing-with-trusted-timestamps-in-php-rfc-3161/">a
  71 blog by David Müller</a>.  I then found
  72 <a href="http://www.rz.uni-greifswald.de/support/dfn-pki-zertifikate/zeitstempeldienst.html">a
  73 good recipe on how to use the service</a> over at the University of
  74 Greifswald.</p>
  75
  76 <p><a href="http://www.openssl.org/">The OpenSSL library</a> contain
  77 both server and tools to use and set up your own signing service.  See
  78 the ts(1SSL), tsget(1SSL) manual pages for more details.  The
  79 following shell script demonstrate how to extract a signed timestamp
  80 for any file on the disk in a Debian environment:</p>
  81
  82 <p><blockquote><pre>
  83 #!/bin/sh
  84 set -e
  85 url="http://zeitstempel.dfn.de"
  86 caurl="https://pki.pca.dfn.de/global-services-ca/pub/cacert/chain.txt"
  87 reqfile=$(mktemp -t tmp.XXXXXXXXXX.tsq)
  88 resfile=$(mktemp -t tmp.XXXXXXXXXX.tsr)
  89 cafile=chain.txt
  90 if [ ! -f $cafile ] ; then
  91     wget -O $cafile "$caurl"
  92 fi
  93 openssl ts -query -data "$1" -cert | tee "$reqfile" \
  94     | /usr/lib/ssl/misc/tsget -h "$url" -o "$resfile"
  95 openssl ts -reply -in "$resfile" -text 1>&2
  96 openssl ts -verify -data "$1" -in "$resfile" -CAfile "$cafile" 1>&2
  97 base64 < "$resfile"
  98 rm "$reqfile" "$resfile"
  99 </pre></blockquote></p>
 100
 101 <p>The argument to the script is the file to timestamp, and the output
 102 is a base64 encoded version of the signature to STDOUT and details
 103 about the signature to STDERR.  Note that due to
 104 <a href="http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=742553">a bug
 105 in the tsget script</a>, you might need to modify the included script
 106 and remove the last line.  Or just write your own HTTP uploader using
 107 curl. :) Now you too can prove and verify that files have not been
 108 changed.</p>
 109
 110 <p>But the Internet need more public trusted timestamp services.
 111 Perhaps something for <a href="http://www.uninett.no/">Uninett</a> or
 112 my work place the <a href="http://www.uio.no/">University of Oslo</a>
 113 to set up?</p>
 114 </div>
 115
 116       <div class="tags">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>.</div>
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 214
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 216
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 218
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 220
 221 <li>2017
 222 <ul>
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 224 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
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 245
 246 </ul></li>
 247
 248 <li>2016
 249 <ul>
 250
 251 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 252
 253 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 254
 255 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 256
 257 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 258
 259 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 260
 261 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 262
 263 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 264
 265 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 266
 267 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 268
 269 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 270
 271 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 272
 273 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 274
 275 </ul></li>
 276
 277 <li>2015
 278 <ul>
 279
 280 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 281
 282 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
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 287
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 289
 290 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 291
 292 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 293
 294 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 295
 296 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 297
 298 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 299
 300 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 301
 302 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 303
 304 </ul></li>
 305
 306 <li>2014
 307 <ul>
 308
 309 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 310
 311 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 312
 313 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 314
 315 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 316
 317 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 318
 319 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 320
 321 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 322
 323 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 324
 325 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 326
 327 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 328
 329 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 330
 331 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 332
 333 </ul></li>
 334
 335 <li>2013
 336 <ul>
 337
 338 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 339
 340 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 341
 342 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 343
 344 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 345
 346 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 347
 348 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 349
 350 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 351
 352 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 353
 354 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 355
 356 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 357
 358 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 359
 360 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 361
 362 </ul></li>
 363
 364 <li>2012
 365 <ul>
 366
 367 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 368
 369 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 370
 371 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 372
 373 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 374
 375 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 376
 377 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 378
 379 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 380
 381 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 382
 383 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 384
 385 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 386
 387 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 388
 389 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 390
 391 </ul></li>
 392
 393 <li>2011
 394 <ul>
 395
 396 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 397
 398 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 399
 400 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 401
 402 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 403
 404 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 405
 406 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 407
 408 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 409
 410 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 411
 412 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 413
 414 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 415
 416 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 417
 418 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 419
 420 </ul></li>
 421
 422 <li>2010
 423 <ul>
 424
 425 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 426
 427 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 428
 429 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 430
 431 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 432
 433 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 434
 435 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 436
 437 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 438
 439 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 440
 441 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 442
 443 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 444
 445 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 446
 447 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 448
 449 </ul></li>
 450
 451 <li>2009
 452 <ul>
 453
 454 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 455
 456 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 457
 458 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 459
 460 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 461
 462 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 463
 464 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 465
 466 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 467
 468 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 469
 470 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 471
 472 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 473
 474 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 475
 476 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 477
 478 </ul></li>
 479
 480 <li>2008
 481 <ul>
 482
 483 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 484
 485 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 486
 487 </ul></li>
 488
 489 </ul>
 490
 491
 492
 493 <h2>Tags</h2>
 494 <ul>
 495
 496  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (16)</a></li>
 497
 498  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 499
 500  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 501
 502  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 503
 504  <li><a href="http://people.skolelinux.org/pere/blog/tags/betalkontant">betalkontant (9)</a></li>
 505
 506  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (12)</a></li>
 507
 508  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (17)</a></li>
 509
 510  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 511
 512  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
 513
 514  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (176)</a></li>
 515
 516  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (159)</a></li>
 517
 518  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (8)</a></li>
 519
 520  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (11)</a></li>
 521
 522  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
 523
 524  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (28)</a></li>
 525
 526  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 527
 528  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (426)</a></li>
 529
 530  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
 531
 532  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (14)</a></li>
 533
 534  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (34)</a></li>
 535
 536  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
 537
 538  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (20)</a></li>
 539
 540  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
 541
 542  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (43)</a></li>
 543
 544  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (16)</a></li>
 545
 546  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (23)</a></li>
 547
 548  <li><a href="http://people.skolelinux.org/pere/blog/tags/kodi">kodi (4)</a></li>
 549
 550  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
 551
 552  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
 553
 554  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
 555
 556  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
 557
 558  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 559
 560  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
 561
 562  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (42)</a></li>
 563
 564  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (13)</a></li>
 565
 566  <li><a href="http://people.skolelinux.org/pere/blog/tags/noark5">noark5 (23)</a></li>
 567
 568  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (317)</a></li>
 569
 570  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (198)</a></li>
 571
 572  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (40)</a></li>
 573
 574  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 575
 576  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (75)</a></li>
 577
 578  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (111)</a></li>
 579
 580  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
 581
 582  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
 583
 584  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 585
 586  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
 587
 588  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (12)</a></li>
 589
 590  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 591
 592  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (7)</a></li>
 593
 594  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 595
 596  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (59)</a></li>
 597
 598  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 599
 600  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
 601
 602  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (71)</a></li>
 603
 604  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (7)</a></li>
 605
 606  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
 607
 608  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (61)</a></li>
 609
 610  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (5)</a></li>
 611
 612  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
 613
 614  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
 615
 616  <li><a href="http://people.skolelinux.org/pere/blog/tags/verkidetfri">verkidetfri (19)</a></li>
 617
 618  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (75)</a></li>
 619
 620  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 621
 622  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (42)</a></li>
 623
 624 </ul>
 625
 626
 627     </div>
 628     <p style="text-align: right">
 629  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 630 </p>
 631
 632   </body>
 633 </html>