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://www.hungry.com/~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://www.hungry.com/~pere/blog/tags/english">english</a>, <a href="http://www.hungry.com/~pere/blog/tags/sikkerhet">sikkerhet</a>.</div>
 117
 118
 119     </div>
 120
 121
 122
 123
 124     <div id="sidebar">
 125
 126
 127
 128 <h2>Archive</h2>
 129 <ul>
 130
 131 <li>2025
 132 <ul>
 133
 134 <li><a href="http://www.hungry.com/~pere/blog/archive/2025/01/">January (4)</a></li>
 135
 136 <li><a href="http://www.hungry.com/~pere/blog/archive/2025/02/">February (3)</a></li>
 137
 138 </ul></li>
 139
 140 <li>2024
 141 <ul>
 142
 143 <li><a href="http://www.hungry.com/~pere/blog/archive/2024/01/">January (1)</a></li>
 144
 145 <li><a href="http://www.hungry.com/~pere/blog/archive/2024/02/">February (1)</a></li>
 146
 147 <li><a href="http://www.hungry.com/~pere/blog/archive/2024/03/">March (2)</a></li>
 148
 149 <li><a href="http://www.hungry.com/~pere/blog/archive/2024/04/">April (3)</a></li>
 150
 151 <li><a href="http://www.hungry.com/~pere/blog/archive/2024/05/">May (1)</a></li>
 152
 153 <li><a href="http://www.hungry.com/~pere/blog/archive/2024/06/">June (1)</a></li>
 154
 155 <li><a href="http://www.hungry.com/~pere/blog/archive/2024/07/">July (2)</a></li>
 156
 157 <li><a href="http://www.hungry.com/~pere/blog/archive/2024/12/">December (1)</a></li>
 158
 159 </ul></li>
 160
 161 <li>2023
 162 <ul>
 163
 164 <li><a href="http://www.hungry.com/~pere/blog/archive/2023/01/">January (3)</a></li>
 165
 166 <li><a href="http://www.hungry.com/~pere/blog/archive/2023/02/">February (1)</a></li>
 167
 168 <li><a href="http://www.hungry.com/~pere/blog/archive/2023/04/">April (2)</a></li>
 169
 170 <li><a href="http://www.hungry.com/~pere/blog/archive/2023/05/">May (3)</a></li>
 171
 172 <li><a href="http://www.hungry.com/~pere/blog/archive/2023/06/">June (1)</a></li>
 173
 174 <li><a href="http://www.hungry.com/~pere/blog/archive/2023/08/">August (1)</a></li>
 175
 176 <li><a href="http://www.hungry.com/~pere/blog/archive/2023/09/">September (1)</a></li>
 177
 178 <li><a href="http://www.hungry.com/~pere/blog/archive/2023/10/">October (1)</a></li>
 179
 180 <li><a href="http://www.hungry.com/~pere/blog/archive/2023/11/">November (4)</a></li>
 181
 182 <li><a href="http://www.hungry.com/~pere/blog/archive/2023/12/">December (1)</a></li>
 183
 184 </ul></li>
 185
 186 <li>2022
 187 <ul>
 188
 189 <li><a href="http://www.hungry.com/~pere/blog/archive/2022/02/">February (1)</a></li>
 190
 191 <li><a href="http://www.hungry.com/~pere/blog/archive/2022/03/">March (3)</a></li>
 192
 193 <li><a href="http://www.hungry.com/~pere/blog/archive/2022/04/">April (2)</a></li>
 194
 195 <li><a href="http://www.hungry.com/~pere/blog/archive/2022/06/">June (2)</a></li>
 196
 197 <li><a href="http://www.hungry.com/~pere/blog/archive/2022/07/">July (1)</a></li>
 198
 199 <li><a href="http://www.hungry.com/~pere/blog/archive/2022/09/">September (1)</a></li>
 200
 201 <li><a href="http://www.hungry.com/~pere/blog/archive/2022/10/">October (1)</a></li>
 202
 203 <li><a href="http://www.hungry.com/~pere/blog/archive/2022/12/">December (1)</a></li>
 204
 205 </ul></li>
 206
 207 <li>2021
 208 <ul>
 209
 210 <li><a href="http://www.hungry.com/~pere/blog/archive/2021/01/">January (2)</a></li>
 211
 212 <li><a href="http://www.hungry.com/~pere/blog/archive/2021/02/">February (1)</a></li>
 213
 214 <li><a href="http://www.hungry.com/~pere/blog/archive/2021/05/">May (1)</a></li>
 215
 216 <li><a href="http://www.hungry.com/~pere/blog/archive/2021/06/">June (1)</a></li>
 217
 218 <li><a href="http://www.hungry.com/~pere/blog/archive/2021/07/">July (3)</a></li>
 219
 220 <li><a href="http://www.hungry.com/~pere/blog/archive/2021/08/">August (1)</a></li>
 221
 222 <li><a href="http://www.hungry.com/~pere/blog/archive/2021/09/">September (1)</a></li>
 223
 224 <li><a href="http://www.hungry.com/~pere/blog/archive/2021/10/">October (1)</a></li>
 225
 226 <li><a href="http://www.hungry.com/~pere/blog/archive/2021/12/">December (1)</a></li>
 227
 228 </ul></li>
 229
 230 <li>2020
 231 <ul>
 232
 233 <li><a href="http://www.hungry.com/~pere/blog/archive/2020/02/">February (2)</a></li>
 234
 235 <li><a href="http://www.hungry.com/~pere/blog/archive/2020/03/">March (2)</a></li>
 236
 237 <li><a href="http://www.hungry.com/~pere/blog/archive/2020/04/">April (2)</a></li>
 238
 239 <li><a href="http://www.hungry.com/~pere/blog/archive/2020/05/">May (3)</a></li>
 240
 241 <li><a href="http://www.hungry.com/~pere/blog/archive/2020/06/">June (2)</a></li>
 242
 243 <li><a href="http://www.hungry.com/~pere/blog/archive/2020/07/">July (1)</a></li>
 244
 245 <li><a href="http://www.hungry.com/~pere/blog/archive/2020/09/">September (1)</a></li>
 246
 247 <li><a href="http://www.hungry.com/~pere/blog/archive/2020/10/">October (1)</a></li>
 248
 249 <li><a href="http://www.hungry.com/~pere/blog/archive/2020/11/">November (1)</a></li>
 250
 251 </ul></li>
 252
 253 <li>2019
 254 <ul>
 255
 256 <li><a href="http://www.hungry.com/~pere/blog/archive/2019/01/">January (4)</a></li>
 257
 258 <li><a href="http://www.hungry.com/~pere/blog/archive/2019/02/">February (3)</a></li>
 259
 260 <li><a href="http://www.hungry.com/~pere/blog/archive/2019/03/">March (3)</a></li>
 261
 262 <li><a href="http://www.hungry.com/~pere/blog/archive/2019/05/">May (2)</a></li>
 263
 264 <li><a href="http://www.hungry.com/~pere/blog/archive/2019/06/">June (5)</a></li>
 265
 266 <li><a href="http://www.hungry.com/~pere/blog/archive/2019/07/">July (2)</a></li>
 267
 268 <li><a href="http://www.hungry.com/~pere/blog/archive/2019/08/">August (1)</a></li>
 269
 270 <li><a href="http://www.hungry.com/~pere/blog/archive/2019/09/">September (1)</a></li>
 271
 272 <li><a href="http://www.hungry.com/~pere/blog/archive/2019/11/">November (1)</a></li>
 273
 274 <li><a href="http://www.hungry.com/~pere/blog/archive/2019/12/">December (4)</a></li>
 275
 276 </ul></li>
 277
 278 <li>2018
 279 <ul>
 280
 281 <li><a href="http://www.hungry.com/~pere/blog/archive/2018/01/">January (1)</a></li>
 282
 283 <li><a href="http://www.hungry.com/~pere/blog/archive/2018/02/">February (5)</a></li>
 284
 285 <li><a href="http://www.hungry.com/~pere/blog/archive/2018/03/">March (5)</a></li>
 286
 287 <li><a href="http://www.hungry.com/~pere/blog/archive/2018/04/">April (3)</a></li>
 288
 289 <li><a href="http://www.hungry.com/~pere/blog/archive/2018/06/">June (2)</a></li>
 290
 291 <li><a href="http://www.hungry.com/~pere/blog/archive/2018/07/">July (5)</a></li>
 292
 293 <li><a href="http://www.hungry.com/~pere/blog/archive/2018/08/">August (3)</a></li>
 294
 295 <li><a href="http://www.hungry.com/~pere/blog/archive/2018/09/">September (3)</a></li>
 296
 297 <li><a href="http://www.hungry.com/~pere/blog/archive/2018/10/">October (5)</a></li>
 298
 299 <li><a href="http://www.hungry.com/~pere/blog/archive/2018/11/">November (2)</a></li>
 300
 301 <li><a href="http://www.hungry.com/~pere/blog/archive/2018/12/">December (4)</a></li>
 302
 303 </ul></li>
 304
 305 <li>2017
 306 <ul>
 307
 308 <li><a href="http://www.hungry.com/~pere/blog/archive/2017/01/">January (4)</a></li>
 309
 310 <li><a href="http://www.hungry.com/~pere/blog/archive/2017/02/">February (3)</a></li>
 311
 312 <li><a href="http://www.hungry.com/~pere/blog/archive/2017/03/">March (5)</a></li>
 313
 314 <li><a href="http://www.hungry.com/~pere/blog/archive/2017/04/">April (2)</a></li>
 315
 316 <li><a href="http://www.hungry.com/~pere/blog/archive/2017/06/">June (5)</a></li>
 317
 318 <li><a href="http://www.hungry.com/~pere/blog/archive/2017/07/">July (1)</a></li>
 319
 320 <li><a href="http://www.hungry.com/~pere/blog/archive/2017/08/">August (1)</a></li>
 321
 322 <li><a href="http://www.hungry.com/~pere/blog/archive/2017/09/">September (3)</a></li>
 323
 324 <li><a href="http://www.hungry.com/~pere/blog/archive/2017/10/">October (5)</a></li>
 325
 326 <li><a href="http://www.hungry.com/~pere/blog/archive/2017/11/">November (3)</a></li>
 327
 328 <li><a href="http://www.hungry.com/~pere/blog/archive/2017/12/">December (4)</a></li>
 329
 330 </ul></li>
 331
 332 <li>2016
 333 <ul>
 334
 335 <li><a href="http://www.hungry.com/~pere/blog/archive/2016/01/">January (3)</a></li>
 336
 337 <li><a href="http://www.hungry.com/~pere/blog/archive/2016/02/">February (2)</a></li>
 338
 339 <li><a href="http://www.hungry.com/~pere/blog/archive/2016/03/">March (3)</a></li>
 340
 341 <li><a href="http://www.hungry.com/~pere/blog/archive/2016/04/">April (8)</a></li>
 342
 343 <li><a href="http://www.hungry.com/~pere/blog/archive/2016/05/">May (8)</a></li>
 344
 345 <li><a href="http://www.hungry.com/~pere/blog/archive/2016/06/">June (2)</a></li>
 346
 347 <li><a href="http://www.hungry.com/~pere/blog/archive/2016/07/">July (2)</a></li>
 348
 349 <li><a href="http://www.hungry.com/~pere/blog/archive/2016/08/">August (5)</a></li>
 350
 351 <li><a href="http://www.hungry.com/~pere/blog/archive/2016/09/">September (2)</a></li>
 352
 353 <li><a href="http://www.hungry.com/~pere/blog/archive/2016/10/">October (3)</a></li>
 354
 355 <li><a href="http://www.hungry.com/~pere/blog/archive/2016/11/">November (8)</a></li>
 356
 357 <li><a href="http://www.hungry.com/~pere/blog/archive/2016/12/">December (5)</a></li>
 358
 359 </ul></li>
 360
 361 <li>2015
 362 <ul>
 363
 364 <li><a href="http://www.hungry.com/~pere/blog/archive/2015/01/">January (7)</a></li>
 365
 366 <li><a href="http://www.hungry.com/~pere/blog/archive/2015/02/">February (6)</a></li>
 367
 368 <li><a href="http://www.hungry.com/~pere/blog/archive/2015/03/">March (1)</a></li>
 369
 370 <li><a href="http://www.hungry.com/~pere/blog/archive/2015/04/">April (4)</a></li>
 371
 372 <li><a href="http://www.hungry.com/~pere/blog/archive/2015/05/">May (3)</a></li>
 373
 374 <li><a href="http://www.hungry.com/~pere/blog/archive/2015/06/">June (4)</a></li>
 375
 376 <li><a href="http://www.hungry.com/~pere/blog/archive/2015/07/">July (6)</a></li>
 377
 378 <li><a href="http://www.hungry.com/~pere/blog/archive/2015/08/">August (2)</a></li>
 379
 380 <li><a href="http://www.hungry.com/~pere/blog/archive/2015/09/">September (2)</a></li>
 381
 382 <li><a href="http://www.hungry.com/~pere/blog/archive/2015/10/">October (9)</a></li>
 383
 384 <li><a href="http://www.hungry.com/~pere/blog/archive/2015/11/">November (6)</a></li>
 385
 386 <li><a href="http://www.hungry.com/~pere/blog/archive/2015/12/">December (3)</a></li>
 387
 388 </ul></li>
 389
 390 <li>2014
 391 <ul>
 392
 393 <li><a href="http://www.hungry.com/~pere/blog/archive/2014/01/">January (2)</a></li>
 394
 395 <li><a href="http://www.hungry.com/~pere/blog/archive/2014/02/">February (3)</a></li>
 396
 397 <li><a href="http://www.hungry.com/~pere/blog/archive/2014/03/">March (8)</a></li>
 398
 399 <li><a href="http://www.hungry.com/~pere/blog/archive/2014/04/">April (7)</a></li>
 400
 401 <li><a href="http://www.hungry.com/~pere/blog/archive/2014/05/">May (1)</a></li>
 402
 403 <li><a href="http://www.hungry.com/~pere/blog/archive/2014/06/">June (2)</a></li>
 404
 405 <li><a href="http://www.hungry.com/~pere/blog/archive/2014/07/">July (2)</a></li>
 406
 407 <li><a href="http://www.hungry.com/~pere/blog/archive/2014/08/">August (2)</a></li>
 408
 409 <li><a href="http://www.hungry.com/~pere/blog/archive/2014/09/">September (5)</a></li>
 410
 411 <li><a href="http://www.hungry.com/~pere/blog/archive/2014/10/">October (6)</a></li>
 412
 413 <li><a href="http://www.hungry.com/~pere/blog/archive/2014/11/">November (3)</a></li>
 414
 415 <li><a href="http://www.hungry.com/~pere/blog/archive/2014/12/">December (5)</a></li>
 416
 417 </ul></li>
 418
 419 <li>2013
 420 <ul>
 421
 422 <li><a href="http://www.hungry.com/~pere/blog/archive/2013/01/">January (11)</a></li>
 423
 424 <li><a href="http://www.hungry.com/~pere/blog/archive/2013/02/">February (9)</a></li>
 425
 426 <li><a href="http://www.hungry.com/~pere/blog/archive/2013/03/">March (9)</a></li>
 427
 428 <li><a href="http://www.hungry.com/~pere/blog/archive/2013/04/">April (6)</a></li>
 429
 430 <li><a href="http://www.hungry.com/~pere/blog/archive/2013/05/">May (9)</a></li>
 431
 432 <li><a href="http://www.hungry.com/~pere/blog/archive/2013/06/">June (10)</a></li>
 433
 434 <li><a href="http://www.hungry.com/~pere/blog/archive/2013/07/">July (7)</a></li>
 435
 436 <li><a href="http://www.hungry.com/~pere/blog/archive/2013/08/">August (3)</a></li>
 437
 438 <li><a href="http://www.hungry.com/~pere/blog/archive/2013/09/">September (5)</a></li>
 439
 440 <li><a href="http://www.hungry.com/~pere/blog/archive/2013/10/">October (7)</a></li>
 441
 442 <li><a href="http://www.hungry.com/~pere/blog/archive/2013/11/">November (9)</a></li>
 443
 444 <li><a href="http://www.hungry.com/~pere/blog/archive/2013/12/">December (3)</a></li>
 445
 446 </ul></li>
 447
 448 <li>2012
 449 <ul>
 450
 451 <li><a href="http://www.hungry.com/~pere/blog/archive/2012/01/">January (7)</a></li>
 452
 453 <li><a href="http://www.hungry.com/~pere/blog/archive/2012/02/">February (10)</a></li>
 454
 455 <li><a href="http://www.hungry.com/~pere/blog/archive/2012/03/">March (17)</a></li>
 456
 457 <li><a href="http://www.hungry.com/~pere/blog/archive/2012/04/">April (12)</a></li>
 458
 459 <li><a href="http://www.hungry.com/~pere/blog/archive/2012/05/">May (12)</a></li>
 460
 461 <li><a href="http://www.hungry.com/~pere/blog/archive/2012/06/">June (20)</a></li>
 462
 463 <li><a href="http://www.hungry.com/~pere/blog/archive/2012/07/">July (17)</a></li>
 464
 465 <li><a href="http://www.hungry.com/~pere/blog/archive/2012/08/">August (6)</a></li>
 466
 467 <li><a href="http://www.hungry.com/~pere/blog/archive/2012/09/">September (9)</a></li>
 468
 469 <li><a href="http://www.hungry.com/~pere/blog/archive/2012/10/">October (17)</a></li>
 470
 471 <li><a href="http://www.hungry.com/~pere/blog/archive/2012/11/">November (10)</a></li>
 472
 473 <li><a href="http://www.hungry.com/~pere/blog/archive/2012/12/">December (7)</a></li>
 474
 475 </ul></li>
 476
 477 <li>2011
 478 <ul>
 479
 480 <li><a href="http://www.hungry.com/~pere/blog/archive/2011/01/">January (16)</a></li>
 481
 482 <li><a href="http://www.hungry.com/~pere/blog/archive/2011/02/">February (6)</a></li>
 483
 484 <li><a href="http://www.hungry.com/~pere/blog/archive/2011/03/">March (6)</a></li>
 485
 486 <li><a href="http://www.hungry.com/~pere/blog/archive/2011/04/">April (7)</a></li>
 487
 488 <li><a href="http://www.hungry.com/~pere/blog/archive/2011/05/">May (3)</a></li>
 489
 490 <li><a href="http://www.hungry.com/~pere/blog/archive/2011/06/">June (2)</a></li>
 491
 492 <li><a href="http://www.hungry.com/~pere/blog/archive/2011/07/">July (7)</a></li>
 493
 494 <li><a href="http://www.hungry.com/~pere/blog/archive/2011/08/">August (6)</a></li>
 495
 496 <li><a href="http://www.hungry.com/~pere/blog/archive/2011/09/">September (4)</a></li>
 497
 498 <li><a href="http://www.hungry.com/~pere/blog/archive/2011/10/">October (2)</a></li>
 499
 500 <li><a href="http://www.hungry.com/~pere/blog/archive/2011/11/">November (3)</a></li>
 501
 502 <li><a href="http://www.hungry.com/~pere/blog/archive/2011/12/">December (1)</a></li>
 503
 504 </ul></li>
 505
 506 <li>2010
 507 <ul>
 508
 509 <li><a href="http://www.hungry.com/~pere/blog/archive/2010/01/">January (2)</a></li>
 510
 511 <li><a href="http://www.hungry.com/~pere/blog/archive/2010/02/">February (1)</a></li>
 512
 513 <li><a href="http://www.hungry.com/~pere/blog/archive/2010/03/">March (3)</a></li>
 514
 515 <li><a href="http://www.hungry.com/~pere/blog/archive/2010/04/">April (3)</a></li>
 516
 517 <li><a href="http://www.hungry.com/~pere/blog/archive/2010/05/">May (9)</a></li>
 518
 519 <li><a href="http://www.hungry.com/~pere/blog/archive/2010/06/">June (14)</a></li>
 520
 521 <li><a href="http://www.hungry.com/~pere/blog/archive/2010/07/">July (12)</a></li>
 522
 523 <li><a href="http://www.hungry.com/~pere/blog/archive/2010/08/">August (13)</a></li>
 524
 525 <li><a href="http://www.hungry.com/~pere/blog/archive/2010/09/">September (7)</a></li>
 526
 527 <li><a href="http://www.hungry.com/~pere/blog/archive/2010/10/">October (9)</a></li>
 528
 529 <li><a href="http://www.hungry.com/~pere/blog/archive/2010/11/">November (13)</a></li>
 530
 531 <li><a href="http://www.hungry.com/~pere/blog/archive/2010/12/">December (12)</a></li>
 532
 533 </ul></li>
 534
 535 <li>2009
 536 <ul>
 537
 538 <li><a href="http://www.hungry.com/~pere/blog/archive/2009/01/">January (8)</a></li>
 539
 540 <li><a href="http://www.hungry.com/~pere/blog/archive/2009/02/">February (8)</a></li>
 541
 542 <li><a href="http://www.hungry.com/~pere/blog/archive/2009/03/">March (12)</a></li>
 543
 544 <li><a href="http://www.hungry.com/~pere/blog/archive/2009/04/">April (10)</a></li>
 545
 546 <li><a href="http://www.hungry.com/~pere/blog/archive/2009/05/">May (9)</a></li>
 547
 548 <li><a href="http://www.hungry.com/~pere/blog/archive/2009/06/">June (3)</a></li>
 549
 550 <li><a href="http://www.hungry.com/~pere/blog/archive/2009/07/">July (4)</a></li>
 551
 552 <li><a href="http://www.hungry.com/~pere/blog/archive/2009/08/">August (3)</a></li>
 553
 554 <li><a href="http://www.hungry.com/~pere/blog/archive/2009/09/">September (1)</a></li>
 555
 556 <li><a href="http://www.hungry.com/~pere/blog/archive/2009/10/">October (2)</a></li>
 557
 558 <li><a href="http://www.hungry.com/~pere/blog/archive/2009/11/">November (3)</a></li>
 559
 560 <li><a href="http://www.hungry.com/~pere/blog/archive/2009/12/">December (3)</a></li>
 561
 562 </ul></li>
 563
 564 <li>2008
 565 <ul>
 566
 567 <li><a href="http://www.hungry.com/~pere/blog/archive/2008/11/">November (5)</a></li>
 568
 569 <li><a href="http://www.hungry.com/~pere/blog/archive/2008/12/">December (7)</a></li>
 570
 571 </ul></li>
 572
 573 </ul>
 574
 575
 576
 577 <h2>Tags</h2>
 578 <ul>
 579
 580  <li><a href="http://www.hungry.com/~pere/blog/tags/3d-printer">3d-printer (19)</a></li>
 581
 582  <li><a href="http://www.hungry.com/~pere/blog/tags/amiga">amiga (1)</a></li>
 583
 584  <li><a href="http://www.hungry.com/~pere/blog/tags/aros">aros (1)</a></li>
 585
 586  <li><a href="http://www.hungry.com/~pere/blog/tags/bankid">bankid (4)</a></li>
 587
 588  <li><a href="http://www.hungry.com/~pere/blog/tags/betalkontant">betalkontant (9)</a></li>
 589
 590  <li><a href="http://www.hungry.com/~pere/blog/tags/bitcoin">bitcoin (13)</a></li>
 591
 592  <li><a href="http://www.hungry.com/~pere/blog/tags/bootsystem">bootsystem (17)</a></li>
 593
 594  <li><a href="http://www.hungry.com/~pere/blog/tags/bsa">bsa (2)</a></li>
 595
 596  <li><a href="http://www.hungry.com/~pere/blog/tags/chrpath">chrpath (3)</a></li>
 597
 598  <li><a href="http://www.hungry.com/~pere/blog/tags/debian">debian (209)</a></li>
 599
 600  <li><a href="http://www.hungry.com/~pere/blog/tags/debian edu">debian edu (159)</a></li>
 601
 602  <li><a href="http://www.hungry.com/~pere/blog/tags/debian-handbook">debian-handbook (9)</a></li>
 603
 604  <li><a href="http://www.hungry.com/~pere/blog/tags/digistan">digistan (11)</a></li>
 605
 606  <li><a href="http://www.hungry.com/~pere/blog/tags/dld">dld (18)</a></li>
 607
 608  <li><a href="http://www.hungry.com/~pere/blog/tags/docbook">docbook (33)</a></li>
 609
 610  <li><a href="http://www.hungry.com/~pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 611
 612  <li><a href="http://www.hungry.com/~pere/blog/tags/english">english (471)</a></li>
 613
 614  <li><a href="http://www.hungry.com/~pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
 615
 616  <li><a href="http://www.hungry.com/~pere/blog/tags/fildeling">fildeling (14)</a></li>
 617
 618  <li><a href="http://www.hungry.com/~pere/blog/tags/freeculture">freeculture (34)</a></li>
 619
 620  <li><a href="http://www.hungry.com/~pere/blog/tags/freedombox">freedombox (9)</a></li>
 621
 622  <li><a href="http://www.hungry.com/~pere/blog/tags/frikanalen">frikanalen (20)</a></li>
 623
 624  <li><a href="http://www.hungry.com/~pere/blog/tags/h264">h264 (20)</a></li>
 625
 626  <li><a href="http://www.hungry.com/~pere/blog/tags/intervju">intervju (43)</a></li>
 627
 628  <li><a href="http://www.hungry.com/~pere/blog/tags/isenkram">isenkram (21)</a></li>
 629
 630  <li><a href="http://www.hungry.com/~pere/blog/tags/kart">kart (23)</a></li>
 631
 632  <li><a href="http://www.hungry.com/~pere/blog/tags/kodi">kodi (6)</a></li>
 633
 634  <li><a href="http://www.hungry.com/~pere/blog/tags/ldap">ldap (9)</a></li>
 635
 636  <li><a href="http://www.hungry.com/~pere/blog/tags/lego">lego (5)</a></li>
 637
 638  <li><a href="http://www.hungry.com/~pere/blog/tags/lenker">lenker (8)</a></li>
 639
 640  <li><a href="http://www.hungry.com/~pere/blog/tags/linuxcnc">linuxcnc (8)</a></li>
 641
 642  <li><a href="http://www.hungry.com/~pere/blog/tags/lsdvd">lsdvd (3)</a></li>
 643
 644  <li><a href="http://www.hungry.com/~pere/blog/tags/ltsp">ltsp (1)</a></li>
 645
 646  <li><a href="http://www.hungry.com/~pere/blog/tags/madewithcc">madewithcc (3)</a></li>
 647
 648  <li><a href="http://www.hungry.com/~pere/blog/tags/mesh network">mesh network (8)</a></li>
 649
 650  <li><a href="http://www.hungry.com/~pere/blog/tags/multimedia">multimedia (48)</a></li>
 651
 652  <li><a href="http://www.hungry.com/~pere/blog/tags/nice free software">nice free software (15)</a></li>
 653
 654  <li><a href="http://www.hungry.com/~pere/blog/tags/noark5">noark5 (27)</a></li>
 655
 656  <li><a href="http://www.hungry.com/~pere/blog/tags/norsk">norsk (326)</a></li>
 657
 658  <li><a href="http://www.hungry.com/~pere/blog/tags/nuug">nuug (200)</a></li>
 659
 660  <li><a href="http://www.hungry.com/~pere/blog/tags/offentlig innsyn">offentlig innsyn (42)</a></li>
 661
 662  <li><a href="http://www.hungry.com/~pere/blog/tags/open311">open311 (2)</a></li>
 663
 664  <li><a href="http://www.hungry.com/~pere/blog/tags/opensnitch">opensnitch (4)</a></li>
 665
 666  <li><a href="http://www.hungry.com/~pere/blog/tags/opphavsrett">opphavsrett (76)</a></li>
 667
 668  <li><a href="http://www.hungry.com/~pere/blog/tags/personvern">personvern (114)</a></li>
 669
 670  <li><a href="http://www.hungry.com/~pere/blog/tags/raid">raid (4)</a></li>
 671
 672  <li><a href="http://www.hungry.com/~pere/blog/tags/reactos">reactos (1)</a></li>
 673
 674  <li><a href="http://www.hungry.com/~pere/blog/tags/reprap">reprap (11)</a></li>
 675
 676  <li><a href="http://www.hungry.com/~pere/blog/tags/rfid">rfid (3)</a></li>
 677
 678  <li><a href="http://www.hungry.com/~pere/blog/tags/robot">robot (17)</a></li>
 679
 680  <li><a href="http://www.hungry.com/~pere/blog/tags/rss">rss (1)</a></li>
 681
 682  <li><a href="http://www.hungry.com/~pere/blog/tags/ruter">ruter (7)</a></li>
 683
 684  <li><a href="http://www.hungry.com/~pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 685
 686  <li><a href="http://www.hungry.com/~pere/blog/tags/sikkerhet">sikkerhet (60)</a></li>
 687
 688  <li><a href="http://www.hungry.com/~pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 689
 690  <li><a href="http://www.hungry.com/~pere/blog/tags/skepsis">skepsis (5)</a></li>
 691
 692  <li><a href="http://www.hungry.com/~pere/blog/tags/standard">standard (80)</a></li>
 693
 694  <li><a href="http://www.hungry.com/~pere/blog/tags/stavekontroll">stavekontroll (7)</a></li>
 695
 696  <li><a href="http://www.hungry.com/~pere/blog/tags/stortinget">stortinget (14)</a></li>
 697
 698  <li><a href="http://www.hungry.com/~pere/blog/tags/surveillance">surveillance (65)</a></li>
 699
 700  <li><a href="http://www.hungry.com/~pere/blog/tags/sysadmin">sysadmin (6)</a></li>
 701
 702  <li><a href="http://www.hungry.com/~pere/blog/tags/usenix">usenix (2)</a></li>
 703
 704  <li><a href="http://www.hungry.com/~pere/blog/tags/valg">valg (9)</a></li>
 705
 706  <li><a href="http://www.hungry.com/~pere/blog/tags/verkidetfri">verkidetfri (23)</a></li>
 707
 708  <li><a href="http://www.hungry.com/~pere/blog/tags/video">video (82)</a></li>
 709
 710  <li><a href="http://www.hungry.com/~pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 711
 712  <li><a href="http://www.hungry.com/~pere/blog/tags/web">web (42)</a></li>
 713
 714 </ul>
 715
 716
 717     </div>
 718     <p style="text-align: right">
 719  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 720 </p>
 721
 722   </body>
 723 </html>