Thermal transfer printer, upper computer, consumable encryption system and consumable encryption method

Abstract

The invention discloses a thermal transfer printer, an upper computer, a consumable encryption system and a consumable encryption method, and relates to the field of thermal transfer printing. The thermal transfer printer comprises a printer mainboard and at least one card reader, an onboard IC card and a micro-control unit are arranged on the printer mainboard, the micro-control unit is connectedwith the onboard IC card and each card reader, and the micro-control unit is further connected with an upper computer; the card reader is used for acquiring first encrypted data of an external IC card arranged on the consumable; and the micro-control unit is used for reading the second encrypted data of the onboard IC card, sending the first encrypted data and the second encrypted data to the upper computer, and receiving the authenticity of the consumable returned by the upper computer and judged according to the first encrypted data and the second encrypted data. The thermal transfer printer is suitable for heat transfer printing, an attacker can be prevented from intercepting plaintext information from a printer mainboard and cracking the plaintext information, the safety is higher, and the possibility that an encryption and decryption algorithm is exposed to a third party due to cracking of the onboard micro-control unit is eradicated.

Description

technical field [0001] The invention relates to the field of thermal transfer printing, in particular to a thermal transfer printer, a host computer, a consumable material encryption system and a consumable material encryption method. Background technique [0002] Thermal transfer printers use special consumables to transfer the coating on the consumables to paper or other types of materials by heating the working principle similar to the print head of a fax machine. The coating material can be selected according to needs. , produce strong adhesion, plus the choice of printing media, to meet the needs of long-term storage. [0003] Since the consumables are consumables and the demand for printing is high, there are counterfeit consumables on the market. At present, the authenticity of the consumables is usually verified by setting a system-on-chip in the thermal transfer printer. However, the verification process is performed by the thermal transfer printer, which makes it...

AI Technical Summary

Problems solved by technology

However, the verification process is performed by the thermal transfer printer, which makes it easy for attackers to directly skip the encryption verification mechanism or intercept the encrypted information and decrypted information from the printer's motherboard, or brute force crack the internal binary program code of the onboard MCU to encrypt data. Cracking, resulting in the current encryption verification process has the disadvantage of low security

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