non-repudiation (Q1327773)
proof of a message sender's identity, e.g. cryptographically
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other details
aliases non-deniability
 undeniable
 non-repudiation of origin
description proof of a message sender's identity, e.g. cryptographically

External Links
(P646) /m/0dt2k
(P3417) Non-repudiation
(P6366) 44209976
(P10283) C44209976
(P11567) nonrepudiation