Method for screening display information
A technology that displays information and is legal, applied in the field of information security to enhance security and avoid duplication of work
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Embodiment 1
[0066] Embodiment 1 of the present invention provides a method for screening displayed information, such as figure 1 shown, including:
[0067] Step 101: the device waits to receive instructions sent by the host computer;
[0068] Step 102: the device judges the type of the received instruction;
[0069] If the instruction to be parsed is received, step 103 is performed;
[0070] If the instruction to be signed is received, step 108 is performed;
[0071] If other operation instructions are received, execute step 115;
[0072] Specifically:
[0073] The device judges the type of the command according to the first and second bytes of the command:
[0074] If the first two bytes are 0x002A, it means that the received instruction is an instruction to be parsed;
[0075] If the first two bytes are 0x002B, it means that the received instruction is an instruction to be signed;
[0076] If the first two bytes are other bytecodes, it means that the received instruction is anoth...
Embodiment 2
[0103] Embodiment 2 of the present invention provides a method for screening displayed information, such as figure 2 shown, including:
[0104] Step 201: the device waits to receive an instruction sent by the host computer;
[0105] Step 202: Determine the type of the received instruction;
[0106] If the instruction to be parsed is received, execute step 203;
[0107] If the instruction to be signed is received, execute step 209;
[0108] If other operation instructions are received, execute step 221;
[0109] Specifically:
[0110] The device judges the type of the command according to the first and second bytes of the command:
[0111] If the first two bytes are 0x002A, it means that the received instruction is an instruction to be parsed;
[0112] If the first two bytes are 0x002B, it means that the received instruction is an instruction to be signed;
[0113] If the first two bytes are other bytecodes, it means that the received instruction is another operation in...
Embodiment 3
[0150] Embodiment 3 of the present invention provides a method for screening displayed information, such as image 3 shown, including:
[0151] Step 301: the device waits to receive an instruction sent by the host computer;
[0152] Step 302: Determine the type of the received command;
[0153] If the instruction to be parsed is received, execute step 303;
[0154] If the instruction to be signed is received, step 309 is executed;
[0155] If other operation instructions are received, execute step 321;
[0156] Specifically:
[0157] The first and second bytes of the instruction are the type part of the instruction, and the device determines the instruction type by judging the first two bytes of the received instruction:
[0158] If the first two bytes are 0x002A, it means that the received instruction is an instruction to be parsed;
[0159] If the first two bytes are 0x002B, it means that the received instruction is an instruction to be signed;
[0160] If the first t...
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