olemus
ISO/IEC 13888:
salgamatusteabe edastus(jada)
salgamistõrje eesmärgil
=
sequence of one or more transfers of non-repudiation information (3.27) for the purpose of non-repudiation

näiteid
https://www.informit.com/articles/article.aspx?p=101192&seqNum=4