Combined two-dimensional code, electronic certificate carrier, and generation and reading apparatus and method

A combined two-dimensional code generating apparatus, comprising:

• a two-dimensional code information generating module, a key information generating module, an abstract computing module, a two-dimensional code coding module, and a two-dimensional code image generating module, wherein:
• the two-dimensional code information generating module is configured for generating data information to be coded into the two-dimensional code;
• the key information generating module is configured for generating a key for computing an abstract;
• the abstract computing module is configured for computing, using a hash algorithm, the data information coded into the two-dimensional code and the abstract of the key;
• the two-dimensional code coding module is configured for combining the abstract information, the key information, and the data information coded into the two-dimensional code into coding data of the two-dimensional code;
• and
• the two-dimensional code image generating module is configured for coding the coding data of the two-dimensional code into the two-dimensional code to generate a two-dimensional code image.

A combined two-dimensional code generating method, comprising the steps of:

• Step S1:
• generating data information to be coded into a two-dimensional code;
• Step S2:
• generating a key for computing an abstract;
• Step S4:
• computing, using a hash algorithm, the data information coded into the two-dimensional code and the abstract of the key;
• Step S5:
• combining the abstract information and the data information coded into the two-dimensional code into coding data of the two-dimensional code;
• Step S6:
• coding the coding data of the two-dimensional code into the two-dimensional code to generate a two-dimensional code image;
• Step S7:
• determining a setting region of a dot matrix based on a positioning image of the two-dimensional code, wherein the setting region is disposed outside of a two-dimensional code image or is at least partially disposed within the two-dimensional code image to supersede an overlapping portion of the two-dimensional code image, wherein the dot matrix entering inside the two-dimensional code image is set such that a sum of a bit error rate caused by the dot matrix and a bit error rate of the two-dimensional code per se is smaller than an error correction rate of the two-dimensional code;
• and
• Step S8:
• generating, based on the key, the dot matrix corresponding to the key in the setting region.

A combined two-dimensional code reading apparatus for reading data information in a combined two-dimensional code, the combined two-dimensional code comprising a two-dimensional code and a dot matrix, the data information and abstract information being coded into the two-dimensional code, key information being coded into the dot matrix, the abstract information being computed based on the data information and the key information using a hash algorithm, the combined two-dimensional code reading apparatus comprising:

• an image acquiring module, a two-dimensional code decoding module, a dot matrix decoding module, an abstract computing module, a correctness verifying module, and a displaying module, wherein:
• the image acquiring module is configured for acquiring an image of the combined two-dimensional code;
• the two-dimensional code decoding module is configured for decoding the two-dimensional code in the combined two-dimensional code to obtain the data information and the abstract information;
• the dot matrix decoding module is configured for decoding the dot matrix in the combined two-dimensional code to obtain the key information;
• the abstract computing module is configured for computing, using a same method as computing an abstract in the combined two-dimensional code, an abstract of synthesized information which results from synthesizing the data information obtained from decoding the two-dimensional code and the key information;
• the correctness verifying module is configured for comparing the computed abstract information with the abstract information obtained from decoding the two-dimensional code to determine a consistency therebetween;
• and
• the displaying module is configured for displaying or performing a corresponding operation on a pass or a failure of verifying the data information based on a verification result of the correctness verifying module.

A combined two-dimensional code reading method for reading data information in a combined two-dimensional code, the combined two-dimensional code comprising a two-dimensional code and a dot matrix, data information and abstract information being coded into the two-dimensional code, key information being coded into the dot matrix, the abstract information being computed using a hash algorithm based on the data information and the key information, the combined two-dimensional code reading method comprising:

• Step S100:
• obtaining an image of a combined two-dimensional code;
• Step S110:
• decoding a two-dimensional code in the combined two-dimensional code to obtain the data information and the abstract information;
• Step S120:
• decoding the dot matrix in the combined two-dimensional code to obtain the key information;
• Step S140:
• computing, using a same method as computing an abstract in the combined two-dimensional code, an abstract of synthesized information which results from synthesizing the data information obtained from decoding the two-dimensional code and the key information;
• Step S150:
• comparing the computed abstract information with the abstract information obtained from decoding the two-dimensional code;
• Step S160:
• determining whether the two pieces of abstract information are consistent;
• Step S170:
• in the case of consistency, displaying or performing a corresponding operation on a pass of verification of the data information;
• and
• Step S180:
• in the case of inconsistency, displaying or performing a corresponding operation on a failure of verification of the data information.

A combined two-dimensional code, comprising:

• a two-dimensional code and a dot matrix, wherein at least part of the dot matrix is disposed at a position inside the two-dimensional code where a positioning image is not blocked;
• the dot matrix is positioned by the positioning image of the two-dimensional code and associated with the two-dimensional code in terms of image;
• a size of a setting region of the dot matrix is associated with an error correction level and an area of the two-dimensional code, such that a sum of a bit error rate caused by the dot matrix and a bit error rate of the two-dimensional code per se is smaller than an error correction rate of the two-dimensional code;
• data information and abstract information are coded in the two-dimensional code;
• and key information for computing an abstract is coded into the dot matrix, the abstract information being computed using a hash algorithm based on the key information and the data information;
• or the dot matrix is disposed outside of an image of the two-dimensional code, the dot matrix being positioned by a positioning image of the two-dimensional code and associated with the two-dimensional code in terms of image;
• and
• data information and abstract information are coded in the two-dimensional code, key information for computing an abstract being coded into the dot matrix, the abstract information being computed using a hash algorithm based on the key information and the data information.