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Version 1 of Secure relative timestamping using a physically unclonable unitary

We try to timestamp all uploads so that ideas' authors can prove inventorship. Below you find a list of TSAs (trusted timestamping authorities) used for this upload, along with their certificates. Using the certificates, the (hash of the) original documents and the all-important tsr-files, with a cryptographic software like OpenSSL, it is possible to check that the below timestamps are correct (further details e.g. here).

We recommend that the idea's author download a copy of all the documents below for personal safekeeping. Note also that we link to the latest certificates only, which may be different from those used for actual timestamping if files are older.

Timestamps

Service: tsa.safecreative.org
Certificate: https://tsa.safecreative.org/certificate

TSR: timestamping_presentation_classical.pdf.tsr
Time: 2017-09-16 09:31:12 (1505547072)
SHA-512 Hash: ed5c61e8cd6d9aa9942596c432943529ace1607739c919b3ca5156dd584f862eb71ef87d95bba6aa0985c98ac346c0aed1796394ae151aabe05a4eba9049b017

TSR: timestamping_description_classical.pdf.tsr
Time: 2017-09-16 09:31:12 (1505547072)
SHA-512 Hash: 15e0cd18ca84ff00e921a416b0cafbb896f966532fc92c2fac50c0851ddbbdb7663f16cf6e6c01278f5ae102b82177d86bf3e7d423561ef92ca8f3c513ead7ee

TSR: timestamping_vulgarization.pdf.tsr
Time: 2017-09-16 09:31:13 (1505547073)
SHA-512 Hash: efb9eaf3187cd36a108b0765350ff4506071b1cb0ae54d7eaf401d3d9838d6b7f89a40ec47030ea45aca4d84b78d719b131343b0d6feaad132e43c183f04b6ca

Service: www.freetsa.org
Certificate: https://www.freetsa.org/files/cacert.pem

TSR: timestamping_presentation_classical.pdf.tsr
Time: 2017-09-16 09:31:09 (1505547069)
SHA-512 Hash: ed5c61e8cd6d9aa9942596c432943529ace1607739c919b3ca5156dd584f862eb71ef87d95bba6aa0985c98ac346c0aed1796394ae151aabe05a4eba9049b017

TSR: timestamping_description_classical.pdf.tsr
Time: 2017-09-16 09:31:10 (1505547070)
SHA-512 Hash: 15e0cd18ca84ff00e921a416b0cafbb896f966532fc92c2fac50c0851ddbbdb7663f16cf6e6c01278f5ae102b82177d86bf3e7d423561ef92ca8f3c513ead7ee

TSR: timestamping_vulgarization.pdf.tsr
Time: 2017-09-16 09:31:10 (1505547070)
SHA-512 Hash: efb9eaf3187cd36a108b0765350ff4506071b1cb0ae54d7eaf401d3d9838d6b7f89a40ec47030ea45aca4d84b78d719b131343b0d6feaad132e43c183f04b6ca

Service: zeitstempel.dfn.de
Certificate: https://pki.pca.dfn.de/global-services-ca/pub/cacert/chain.txt

TSR: timestamping_presentation_classical.pdf.tsr
Time: 2017-09-16 09:31:11 (1505547071)
SHA-512 Hash: ed5c61e8cd6d9aa9942596c432943529ace1607739c919b3ca5156dd584f862eb71ef87d95bba6aa0985c98ac346c0aed1796394ae151aabe05a4eba9049b017

TSR: timestamping_description_classical.pdf.tsr
Time: 2017-09-16 09:31:11 (1505547071)
SHA-512 Hash: 15e0cd18ca84ff00e921a416b0cafbb896f966532fc92c2fac50c0851ddbbdb7663f16cf6e6c01278f5ae102b82177d86bf3e7d423561ef92ca8f3c513ead7ee

TSR: timestamping_vulgarization.pdf.tsr
Time: 2017-09-16 09:31:11 (1505547071)
SHA-512 Hash: efb9eaf3187cd36a108b0765350ff4506071b1cb0ae54d7eaf401d3d9838d6b7f89a40ec47030ea45aca4d84b78d719b131343b0d6feaad132e43c183f04b6ca