Trusted lottery drawing system and method based on non-contact smart card
A non-contact smart card and smart card technology, applied in the field of blockchain, can solve the problems of difficulty in guaranteeing the fairness of the lottery program and lottery number results, difficult for users, and effective supervision, so as to improve safety and reliability, eliminate the Interfere, ensure safe and credible effects
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Embodiment 1
[0053] like figure 1 As shown, this embodiment proposes a contactless smart card-based trusted lottery system, the system includes a smart card and an NFC terminal device;
[0054] The smart card is used to establish non-contact data communication with the NFC terminal device to carry out the NFC card swiping lottery, and call the security algorithm in the card to generate the lottery number result;
[0055] The NFC terminal device is used to read the smart card information and obtain the result of the lottery number.
[0056] The smart card has a built-in hardware security chip and is integrated with an embedded lottery card application; the NFC terminal device is provided with a lottery terminal application; the lottery terminal application is used to establish contactless data communication with the smart card by invoking the terminal NFC function to obtain the smart card The generated lottery number results with the card signature are sent to the lottery background system...
Embodiment 2
[0099] Corresponding to the above-mentioned Embodiment 1, Embodiment 2 of the present invention proposes a trusted lottery method based on a contactless smart card, such as: image 3 As shown, the method includes:
[0100] S100, the smart card and the NFC terminal device establish contactless data communication for NFC card swiping lottery;
[0101] S200, the smart card generates a lottery number result by invoking an in-card security algorithm and sends the result to the NFC terminal device.
[0102] Further, the method also includes:
[0103] The lottery terminal application obtains the signature data and card signature returned by the card, and encrypts the signature data and card signature with the pre-acquired public key of the lottery system and sends them to the lottery background system;
[0104] The lottery background system decrypts the data, and completes the data verification of the signature data and the card signature. If the card identity verification is normal,...
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