A method and device for data transmission of ccid protocol equipment

Abstract

The invention discloses a CCID protocol device data transmission method and a device thereof, which are used for solving the problem of low communication data transmission efficiency of the CCID protocol device in the prior art. The method comprises the following steps: the terminal obtains the CPU bit information of the CCID protocol device; the CPU bit information is obtained from the CCID protocol device and fed back to the terminal by the CCID protocol device according to the CCID instruction sent by the terminal; Adding a random number of a first set length at a preset position of the instruction to be output according to the CPU bit information and the length of the instruction to be output, generating the pre-processed output instruction, so that the length of the output instructionafter the preprocessing is an integer multiple of 2n bytes, An instruction to be output comprises a command header field and an APDU command field, The APDU command field contains output data, a formula is described in the description, n is an integer greater than or equal to 1; The pre-processed output instruction is sent to the CCID protocol device according to 2n bytes.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a CCID protocol device data transmission method and device. Background technique [0002] The communication format of existing CCID protocol devices (USB Chip / Smart Card Interface Devices, USB chip smart card interface devices / Integrated Circuit(s) Cards Interface Devices, integrated circuit card interface devices) protocol devices and terminals for data transmission is generally: [0003] The output command format for the terminal to send data to the CCID protocol device is as follows: figure 1 As shown, it includes a Header field (command header) field and an APDU (Application Protocol Data Unit, application protocol data unit) command field, wherein the Header field is 10 bytes, and the APDU command field can be composed of instruction category CLA, instruction code INS, Parameters P1, P2, data length Len and a data field of 0 to 255 bytes are composed, and the d...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of low communication data transmission efficiency of CCID protocol equipment in the prior art, the embodiment of the present invention provides a CCID protocol equipment data transmission method and device

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