The consumer system generates a first verification code and a second verification code.

The use of the stored verification code and label verification code may help prevent attaching an incorrect label to the item.

Enter the verification code in the verification code field.

Enter the verification code to “verification code” field.

An anti-forgery certificate for identifying the truth of an object by verifying a micro-code and a verification code is provided.

Each memory stores a disrupt control code.

The computer system then compares the verification code with the one-time transaction code and makes a successful identity verification if the verification code matches the one-time transaction code.

The verification code is preferably a covert code only conditionally revealed.

The method allows a comparison between the identified verification code with a verification code found on or in the target item in order to verify authenticity of the received product-identifying code.

To verify the authenticity of the product item, the user sends the product-identifying code to a verification center, which identifies the verification code associated with the received product-identifying code.

The method for generating and verifying verification codes facilitates the verification code input verification of the user, and is convenient in operation and has a desirable verification effect.

The verification apparatus operates on the account information with a verification algorithm (66, 68, 70) to generate an answer corresponding to the verification code.

The LDPC code is based on a mother code of code length 672.

The verification code is provided to the memory responsive to a valid authorization code.

The anti-decryption of the verification code is improved without affecting user experience, and security of user verification is improved.