Abstract: Embodiments of the disclosure provide systems, methods, and computer readable instructions for non-repudiation communications, including provisions for non-repudiation of the identities of the sender and receiver, non-repudiation of the information sent and the information received, the time that various portions of the transaction or communication occurred, and other parameters associated therewith. Embodiments of the disclosure can be readily implemented in conjunction with public key systems to advantageously provide complete non-repudiation of origin and delivery of digital data.