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Update timing accuracy statements in the policy document #179

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Dec 9, 2022
Merged

Update timing accuracy statements in the policy document #179

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f0ae57f
update timing accuracy section
malancas Dec 9, 2022
37209ee
Update docs/tsa-policy.md
malancas Dec 9, 2022
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18 changes: 8 additions & 10 deletions docs/tsa-policy.md
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Expand Up @@ -574,24 +574,22 @@ The TSA shall ensure that time-stamp tokens are issued securely and include the

In particular:

1. The time-stamp token shall include an identifier for the time-stamp policy;
1. The time-stamp token shall include an identifier for the time-stamp policy.

1. Each time-stamp token shall have a unique identifier;
1. Each time-stamp token shall have a unique identifier.

1. The time values the TSU uses in the time-stamp token shall be traceable to
at least one of the real time values distributed by a UTC(k) laboratory.

1. The time included in the time-stamp token shall be synchronized with UTC
within the accuracy defined in this policy and, if present, within the
accuracy defined in the time-stamp token itself;
1. The time-stamp provider should periodically monitor its correctness of time
with a set of trusted UTC sources. The recorded accuracy should be included
in the returned time-stamp token.

1. If the time-stamp provider's clock is detected
(see section [7.3.2c](#732-clock-synchronization-with-utc)) as being out of
the stated accuracy (see section [7.1.2e](#712-tsa-disclosure-statement)))
then time-stamp tokens shall not be issued.
1. The time-stamp provider SHOULD monitor for accuracy and alert if it's found
to be out of sync.

1. The time-stamp token shall include a representation (e.g., hash value) of
the datum being time-stamped as provided by the requestor;
the datum being time-stamped as provided by the requestor.

1. The time-stamp token shall be signed using a key generated exclusively
for this purpose.
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