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[[meta title="PGP Trust Models"]]
You can see your trust database parameters like this:
gpg --with-colons --list-key bogusgarbagehere 2>/dev/null | head -n1
for me, it looks like this:
tru::1:1220401097:1220465006:3:1:5
These colon-delimited records say (in order):
tru : this is a trust database record
<empty> : the trust database is not stale (might be 'o' for old, or 't' for "built with different trust model and not yet updated")
1 : uses new "PGP" trust model: this is just the old trust model plus trust signatures. I'll go into trust signatures later.
1220401097 : seconds since the epoch that i created the trust db.
1220465006 : seconds after the epoch that the trustdb will need to be rechecked (usually due to the closest pending expiration, etc)
3 : Either 3 certifications from keys with marginal ownertrust are needed for full User ID+Key validity
1 : Or 1 certification from a key with full ownertrust is needed for full User ID+Key validity
5 : max_cert_depth (not sure exactly how this is used, though the name is certainly suggestive)
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