Pax Computer Technology (shenzhen) Co., Ltd.

Shenzhen Pax Smart New Technology Co., Ltd.

Youren Chen

Huan Wang

Aiping Zhou

Luzhuang Wang

An encryption method and a decryption method for a payment key are provided. The encryption method includes: generating an AES file key and an AES key through a key store management system; generating, by the back-end system, a SM4 white box secret key, a SM2 public key and a SM2 private key and saving the SM2 private key; receiving the SM4 white box secret key and the SM2 public key sent by the back-end system; encrypting, by using the AES file key, the SM4 white box secret key and the SM2 public key to generate and save a ciphertext of the SM4 white box secret key and the SM2 public key; encrypting, using the SM4 white box secret key, the AES key and the SM2 public key, a plaintext of the payment key issued by an electronic payment system to generate and save a ciphertext of the payment key.

Encryption method and decryption method for payment key, payment authentication method, and terminal device

The present application provides a method for implementing a middleware based on EMV, a terminal device, and a computer-readable storage medium. The method includes: establishing a middleware based on EMV L2, wherein the middleware provides a first interface for an upper-layer application of the terminal device to call; after the middleware receives a calling request for the first interface sent by the upper-layer application according to detected information of a IC card, calling an interface of an Entry library according to the calling request to obtain a return result of the Entry library, wherein the return result of the Entry library comprises an application identifier of the IC card; and determining an EMV L2 library matching the IC card based on the application identifier, and calling an interface of the EMV L2 library matching the IC card, to complete a contactless process with the IC card.

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Guangdong, China

Youren Chen