Method and device for justification of a transaction monetary.

摘要

This device (1) of justification of a financial transaction has: - means (40, 40 ′, 40 ″) to emit at short range, a data item (dm) representative of an upright of this transaction, to a personal equipment (2) is located in the vicinity of the device, this personal equipment (2) being adapted to send this datum (d) to a server of confidence (100), via a mobile telecommunication network (r1); - means (70) for receiving at short range, adapted to receive, via said personal equipment (2), a message (m4) encrypted from the server of confidence (100); and - means (10) to decrypt this message (m4) and, if appropriate, to extract the message (m4), a proof of a financial transaction corresponding to the upright.