Technologies related to mobile credit payment are disclosed. In an implementation, a credit payment request is generated and sent to a user account of a credit payment application (APP) installed on a mobile computing device. A payment response message is then received from the mobile computing device. The payment response message is parsed to identify an APP public key license. A pre-stored credit authorization public key is used to verify the APP public key license and an APP public key is received from the APP public key license if the verification is successful. A payment deduction request is generated and sent to the user account of the credit payment APP. A payment authorization encrypted using asymmetric key encryption is received from the mobile computing device. The APP public key is used to decrypt the payment authorization, and a transaction log is recorded if the second response message is successfully decrypted.