olemus
ISO/IEC 13888:
salgamistõrje teenuste andmise kriteeriumide kogum,
asitõendite tekitamise ja kontrollimise ning otsustuse reeglistik
= set of criteria for the provision of non-repudiation services
Note. More specifically, it is a set of rules to be applied for the generation and verification of evidence and for adjudication.

näiteid
https://technodocbox.com/Email/98374757-Bt-managed-secure-messaging-non-repudiation-policy.html

standardid
https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-X.813-199610-I!!PDF-E&type=items