Assertion: signature's information | /r/HasProperty | signed by a third party user
Facets:
value: digitally
type: MANNER
value: more specifically
type: MANNER
value: to attest to the association
type: PURPOSE
Source sentences:
text: A given public key (or more specifically, information binding a user name to a key) may be digitally signed by a third party user to attest to the association between someone (actually a user name) and the key.