Publication Archive
The Publication Code provides the mathematical basis for independent evidence.
Each Guardtime Keyless Signature is cryptographically related to each of the newspaper publications that have appeared after its publication. Guardtime publishes the Publication Code once a month in newspapers distributed worldwide. A new Publication Code for the Guardtime Calendar is generated by Guardtime at the 15th day of every month at 00:00:00 UTC time. The code is printed in newspapers within the next 5 days depending on the publishers´ schedules.
The Publication Code that is published in newspapers contains a hash value as well as a date and time record. The hash value is an aggregate hash summary of all the hash values of the Guardtime Calendar beginning with the creation of the Guardtime Calendar through to the published date and time.
Verification using the electronic Calendar is typically sufficient for regular use. Publication in widely witnessed media is an additional mechanism which provides truly independent verification; the integrity of the media acts as a trust anchor for the Guardtime Keyless Signature service.
2013 Publications
Guardtime publishes the Publication Code in the World Edition of Financial Times. The following Publication Codes can be found on the back page of the Companies and Markets section.
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Financial Times
March 19, 2013
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Financial Times
February 19, 2013
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Financial Times
January 18, 2013
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2012 Publications
Guardtime publishes the Publication Code in the World Edition of Financial Times. The following Publication Codes can be found on the back page of the Companies and Markets section.
Financial Times
December 20, 2012
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Financial Times
November 20, 2012
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Financial Times
October 19, 2012 |
Financial Times
September 20, 2012
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Financial Times
August 17, 2012
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Financial Times
July 18, 2012
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Financial Times
June 20, 2012
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Financial Times
May 21, 2012
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Financial Times
April 19, 2012
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Financial Times
March 20, 2012
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Financial Times
February 20, 2012
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Financial Times
January 19, 2012
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2011 Publications
Guardtime publishes the Publication Code in the World Edition of Financial Times. The following Publication Codes can be found on the back page of the Companies and Markets section.
Financial Times
December 20, 2011
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Financial Times
November 17, 2011
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Financial Times
October 20, 2011
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Financial Times
September 20, 2011
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Financial Times
August 18, 2011
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Financial Times
July 21, 2011
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Financial Times
June 17, 2011
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Financial Times
May 17, 2011
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Financial Times
April 18, 2011
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Financial Times
March 17, 2011
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Financial Times
February 17, 2011
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Financial Times
January 19, 2011
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2010 Publications
Guardtime publishes the Publication Code in the World Edition of Financial Times. The following Publication Codes can be found on the back page of the Companies and Markets section.
Financial Times
December 17, 2010
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Financial Times
November 17, 2010
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Financial Times
October 18, 2010
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Financial Times
September 17, 2010
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Financial Times
August 17, 2010
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Financial Times
July 19, 2010
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Financial Times
June 17, 2010
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Financial Times
May 18, 2010
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Financial Times
April 19, 2010
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Financial Times
March 17, 2010
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Financial Times
February 17, 2010
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Financial Times
January 18, 2010
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2009 Publications
Guardtime publishes the Publication Code in the World Edition of Financial Times. The following Publication Codes can be found on the back page of the Companies and Markets section.
Financial Times
December 17, 2009
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Financial Times
November 18, 2009
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Financial Times
October 19, 2009
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Financial Times
September 19, 2009
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Financial Times
August 18, 2009
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Financial Times
July 17, 2009
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Financial Times
June 17, 2009
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Financial Times
May 19, 2009
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Financial Times
April 16, 2009
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Financial Times
March 18, 2009
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Financial Times
February 18, 2009
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Financial Times
January 19, 2009
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2008 Publications
Guardtime publishes the Publication Code in the World Edition of Financial Times. The following Publication Codes can be found on the back page of the Companies and Markets section.
Financial Times
December 17, 2008
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Financial Times
November 18, 2008
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Financial Times
October 20, 2008
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Financial Times
September 18, 2008
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