non-repudiation of submission
Technical computing term: a property that ensures a sender cannot deny having submitted a particular message or data.
This system uses digital signatures to guarantee non-repudiation of submission.
否認不可 is a more general term for non-repudiation, while 発信の否認不能 specifically refers to non-repudiation of submission (origin).
Compound of 発信 (transmission/submission), の (possessive particle), 否認 (denial/repudiation), and 不能 (impossible). A direct translation of the English computing term 'non-repudiation of submission'.